Yes, it has definitely been done, and it definitely requires machining new dovetails in the slide. I don't have any links handy to the necessary sights, but the front sight and rear sight come from different parts kits, so do your research carefully.
Personally, I've seen CZ 52's at gun shows for sale used with tritium sights and also with a ghost ring sight. I also saw one with the OEM front sight and an adjustable rear sight installed.
Scott