hey mate i have rear set brake from mk3 if works for you check this https://www.car.gr/parts/view/30731788-touota-supra-mk3#bigger-photos version with brake inside 280mm rotor disk
I have a Strut brace 1st Decat pipe 2nd decat pipe Brand new UK front and rear calipers Brand new mk4 Facelift headlight Intercooler Auto mph clocks and rev counter Power steering resovoir Indicators stalk Pm'd you