This mod improves the Zero Hour game by fixing almost all bugs in the game, with tons of balances, improved AI, and many enhanced features. There are also additional stuffs for all factions and sub-factions including Civilians. This mod also including playable Boss General with fully functional AI.
Looks like these are all unused civilian building models that can be found in the game files. Probably there are a few more scattered around, but these are what I found so far.
See more of these (as well as other civilian building fixes) here: Facebook.com