In case there's any confusion about the attachment methods mentioned by Mick and Hobson I thought the following might help.
The Australian flares were designed to be fitted with small mushroom-type plastic buttons that were fitted to the outside of the guards, as described by Mick. These buttons (part HYA5841) slotted into cut-outs along the inner edge of the
flare. Small metal clips (part MYH0045) were used to clamp the outer edge of the
flare to the metal backing strip. Early on the mushroom buttons were dispensed with because the holes in the guard created a spot where rust could easily form, and the appearance without them was satisfactory.
The mushroom buttons and fastening screws, plus the edge clips all come in a pack - part HYL6427 (picture below). Mini Kingdom has NOS kits. Be aware that the flares now being made no longer have the cut-outs so they will need to be modified if the button method is used.
Also below are the
fitting instructions that came with
flare accessory kits. HYL3937 is the standard
flare kit (as per Cooper S). HYL3942 is the wide
flare kit. JS is having the tooling for the wide flares made at the moment.
Attachment:
HYL6427.jpg
Attachment:
Flare Fitting Instructions p1.jpg
Attachment:
Flare Fitting Instructions p2.jpg