The good news for me is I was able to find all the parts I needed at Numrich a long while ago.
Just thinking out loud here (and off topic from OP)=
Why can't aftermarket companies manufacture, uhm, aftermarket parts to service the CZ? Is it a problem with patents??? I wouldn't think so.
No problem rebuilding a Harley-Davidson, air cooled VW Beetles, Kirby vacuums and the venerable 1911 with non-factory parts.
U.S. made aftermarket parts also avoids ATF importation problems----- if they were produced.
Methinks the aftermarket conglomerates could simply step up their offerings, unless of-course, the CZ shooting market is rather niche and will not support the money expenditure by the likes of a Ed Brown, Bill Wilson or ??