Here are a couple I've done.

Elbow to fit a standard air filter housing to an HIF44
[url]https://www.thingiverse.com/thing:5733101[/url]
[img]https://cdn.thingiverse.com/assets/0d/b2/c5/6d/90/large_display_62fa5f57-c684-4623-ae78-5d54b286a9aa.jpg[/img]

A little collar to tidy up the end of the air filter housing when the clunky air temperature compensation thing has been thrown away.
[url]https://www.thingiverse.com/thing:5094050[/url]
[img]https://cdn.thingiverse.com/assets/80/d9/85/0a/17/large_display_2789dc98-823b-48de-951a-6edb93775fbd.jpg[/img]

Tim

Just finished this up tonight.
Its to replace a mark 1 speedo needle.

Guestimate the size from the remains, put it in CAD and printed a negative to be cast in epoxy, since I didn't have any filament in the right color.

Needs a polish but came up well I think.

https://www.thingiverse.com/thing:4839919
Dimple die

https://www.thingiverse.com/thing:4225821
HIF44 substack

https://www.thingiverse.com/thing:4658494
HIF44/HS6 velocity stack

https://www.thingiverse.com/thing:6180213
HS2 velocity stack

https://www.thingiverse.com/thing:4609072
Mini/Moke heater vent

https://www.thingiverse.com/thing:3626911
Moke coasters

https://cults3d.com/en/3d-model/various/low-poly-porte-clefs-mini-moke
Mini moke keyring :P

https://www.thingiverse.com/thing:4864662
Minilite wheelcap

https://www.thingiverse.com/thing:6307223
Clubby interior door handle surround.

Some others I've found while searching for Classic Mini related prints (I can't of course guarantee that any of these will work, or match your model Mini)

SU HIF44 Air Cleaner Elbow
[url]https://www.thingiverse.com/thing:5733101[/url]

Gauge holder allow extra gauges to be added to a Cooper S 3 clock binnacle
[url]https://www.thingiverse.com/thing:5913417[/url]

Seat Belt cover
[url]https://www.thingiverse.com/thing:3018522[/url]

Centre binnacle extension piece for a tachometer like the old Broadspeed type
[url]https://www.thingiverse.com/thing:4710094[/url]

Case for a 12v power adaptor which fits in the ashtray space in the upper dash pad
[url]https://www.thingiverse.com/thing:1638494[/url]

Gearbox spring and ball tool for synchronizer assembly
[url]https://www.thingiverse.com/thing:3838125[/url]
or
[url]https://www.thingiverse.com/thing:5371649[/url]

Gearbox Double Roller Bearing Removal Spacer Tool
[url]https://www.thingiverse.com/thing:3838110[/url]

Wheel Bearing Installation Tool - install the outer rings of new wheel bearings for disc type minis
[url]https://www.thingiverse.com/thing:3838122[/url]

Clutch Slave Filler - Pre Verto versions
[url]https://www.thingiverse.com/thing:6531954[/url]

Sun visor mounting brackets
[url]https://www.thingiverse.com/thing:5324057[/url]

Demister vent
[url]https://www.thingiverse.com/thing:5371986[/url]

Starter motor plug - magneti marelli pre-engaged starter
[url]https://www.thingiverse.com/thing:4942483[/url]

Door lock plinth/surround
[url]https://www.thingiverse.com/thing:4940208[/url]

Clutch oil seal tool
[url]https://www.thingiverse.com/thing:4600947[/url]

Phone holder (replaces dashpad ashtray)
[url]https://www.thingiverse.com/thing:2203204[/url]

LHS heater tube
[url]https://www.thingiverse.com/thing:3969645[/url]

CZH628 B-pillar striker blanking cover plate
[url]https://www.thingiverse.com/thing:4680972[/url]

123ignition electronic distributor seal
[url]https://www.thingiverse.com/thing:4841962[/url]

Cup holder - attaches to front seat bracket
[url]https://www.printables.com/model/480988-classic-mini-cup-holder[/url]

Steering column indicator/blinker holder
[url]https://www.printables.com/model/859028-classic-mini-blinker-holder[/url]

String method clips for DIY toe check
[url]https://www.printables.com/model/757603-classic-mini-string-method-tracking-front-clips[/url]

Grille Grommet for Clubman grille (CZH614)
[url]https://www.thingiverse.com/thing:2526421[/url]

I have designed various 3D printed tools and items to help me out during my Mini restoration and since 3D printers seem ubiquitous, I thought it would be great for the community to have a thread where we can share links. If you have your own, or find any designs that you'd like to share, please post them.

Some of my designs (from my Printables profile [url]https://www.printables.com/@Mearcat/models[/url]) :

Door clamp - This tool helps hold the door while fitting/adjusting them. Suits wind-up and sliding window models
[url]https://www.printables.com/model/250164-classic-mini-door-clamp[/url]
[img]https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiR6VzJFHd4TdTvzB6D4ZltvbmATKt0B-uUmkjPHAGHtz4JIVUej0rKqMlc2y_bxt143xgcfKWdqDIMtq4x_qR1imRrfhgsBkbBoVIFsWAos8TrhrcdMlWVzFQOZjGsv5T-kr3eL5K7YNG-F5Dmh6wwXAoQ1FpMQB46nTLMN9l6fEaONeGnn4z24CTNMg/w514-h386/IMG_6199.jpg[/img]

Panel gap tools - Simple tool for setting car panel & door gaps
[url]https://www.printables.com/model/244897-car-panel-gap-gauge-tool[/url]
[img]https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_HCeaBov0kdcrOiiZl_-uLe5n3g2OOb-QQGS_UVQ8MB6hrfKdwgdbJnnVOfKuhkBBa7YJAN78hYBFWFxZoLWmC5xovx32B9G0wgxsqNim8ieRBRGTbZqp2SWmlr6XOj77lpRy-Y4nSWgCFUvpQrCY-geYcbwKoJ1a5jXGGBHleeTjr7dsrK9v3n6HeA/w537-h354/IMG_6312.jpg[/img]

Rear quarter window sanding block - Sandpaper holder for sanding quarter window post-rust repair
[url]https://www.printables.com/model/696693-classic-mini-rear-quarter-window-sanding-block[/url]
[img]https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvvxdXi9tlFPWxOdBlGoHExcMD-jrc0VaA-6EgsVteXtyQPsX_tE1ugBZCp8Vhi-Uco5kR1o77BXdW5LU04eTU0c3JHSO7TL5alMR8UQieTav1jZZQXFSrk6J14qL_64IMPS1xZI8VUUG2JMQuTvlYNqA-4yf_ASWACcUU0rLOdSLwhEPJIddYrvOIfw/w540-h477/IMG_6396.jpg[/img]

Flexible sanding block - for sanding car panels or anything curved
[url]https://www.printables.com/model/505709-flexible-sanding-block[/url]
[img]https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgH9vqv6pRSPoH_2GZ24l_t_afJNaPrEi-yuDKwV4In7N6_LmahcKPw9MMCoWweLSR7HnQybmyiu2xAM-CZ4H7SzQpUHRM1PBwWhB_HR1BRKwK8TkCgSEX9fejFo7eNsAelvRrQ1FIAdsdTCsBXeMVzvBzroYO0DqCiWiaGH3blW9-iJs6PIudg7MFaiA/w405-h614/IMG_6398.jpg[/img]

Door hinge templates for aligning hinge holes new A-panels
[url]https://www.printables.com/model/871604-classic-mini-external-door-hinge-templates-for-a-p[/url]
[attachment=0]Door Hinge Guides.jpg[/attachment]