The best site I have come across for this type of thing is
www.e-interiors.net
Its mainly a resource for interior designers, there are 2D dwg as well as 3D dwg but not for everything. Its fairly well organised but it does help to know what you are after to help refin the searches. Only thing I dont like is it is very slow.
The models are also from the manufature and are very good.
For this type of thing to really work the backend database needs to be rock solid, making is easu and quick to find stuff. Also keeping the libraries uptodate
jhv