Peter,
I run 4 different 75 Kadet 2s on a variety of frames. Two on 75B SA, one on a Stainless Steel 75B and one on my wife's P-01. All but one required fitting and some tuning to run with out issues. Also have a Kadet Kit for my Shadow 2. The easiest set up was with the 75 B Single action. Use this one for falling plate and bowling pin matches with a red dot. Have even won a couple. When I don't it is not the guns fault.
Good luck on your search.
JW
P.S. CZ custom had some 75 SA lowers at a reasonable price. $475 I think.