Detailed indoor building

I would like to use a 3D indoor model of an extensive building such as faculty, clinic, with a large amount of hallways, to test indoor navigation instructions on a users.
The idea is, that we would use head mounted displays to visualize a model. So my question is, if anyone has already produced a detailed indoor model (e.g. detailed interior design with vending machines, tables, chairs…) and is perhaps prepared to share it? My searches have unfortunately come to a dead end.

Thank you for your help and suggestions.