this is where you have to be really carefull you could use 10 inch rotors with 10 inch disks, however the clamping force ratio of the piston's might be greatly different (the caliper bore ratio)
this could give you very hard brake feel with little actual force on the rotors. or you could end up with a realy soft pedal that doesnt extend far enough for you.
Minimum thickess would also play a point as I would recomen using them only if the calipers stock disk falls within the same tolorances as the min/max thickness of the subsitute disk.
then you will have to work out if the disk is floating ot the caliper will be Floating disks are uncommon but you need to make sure they accomidate for wear correctly.
Personally I would not try to get it to work when brakes that work are so important
