I have also a question linked to that topic: Is there a submod, that makes the easter cities 'ovale' too? I like the look of them (far more realistic IMO) and hate the big ugly square cities.

About your question, admiral^ave, sorry I don't know a mod that would change them back, but it shouldn't be to difficult to change the models back. Try a Google/Forum search to find out which files are related to campaignmap models and then search for a guide to change them.

Ceterum censeo Romam esse delendam