yes, I just put a McM CZ550 stock on a 1967 ZKK600, just asked for factory inlet and barrel channel and everything dropped in.
I had to do a bit around the barrel boss, the safety, and the very rear of the triggerguard but other than that it was perfect.
If you'd only broke your a couple weeks ago, I wouldn;t have practically given my wooden one away!
You could also try AHR for a take-off factory CZ stock
