I don't know of any slot fillers for the CZ 72° dovetailed sight bases. They are larger than the standard US spec 3/8" 60° dovetails. Think the easist thing to do would be to carve the original sights down into slot fillers. I'd suspect there might be a suppier somewhere in Europe, but that's simply a guess on my part.
Also, I've not done a side by side look see, but I'm under the impression the triggers are so different that one from a CZ 452, nor a Walther KK-100 would fit. A very good smith might/should be able to adapt the receiver to accept a better trigger, but the cost would probably be prohibative.
The good news, there's been at least one guy here at RFC that has had some success in tuning up the trigger into something a bit nicer and user friendly.
Good luck with yours!
Also, I've not done a side by side look see, but I'm under the impression the triggers are so different that one from a CZ 452, nor a Walther KK-100 would fit. A very good smith might/should be able to adapt the receiver to accept a better trigger, but the cost would probably be prohibative.
The good news, there's been at least one guy here at RFC that has had some success in tuning up the trigger into something a bit nicer and user friendly.
Good luck with yours!