Purchase interior architecture models as dif files

Hi,

I am looking for realistic architectural dif models where the interior is modeled as well and which can be entered and walked through (e.g. including multiple rooms that are textured). The building packs available in the shop are too fantasy like and game related. In particular, at the moment, I would need an old manorial building where English auctions are going to be performed. Besides the shop, does anyone know of an online resource or development studio that would offer such models; especially in dif format, such that they can be included in the Torque Game Engine with no effort?

thanks