I would make sure to have the latest 1.49.01 installed. Now DR does work with this version, but from experience, and the word on the street is that its buggy and might give you issues.

The latest build 1.49.01 will not let vray materials come over with a component if you copy or import the file in. So you are hosed even if you found a resource, which I have not yet found one. Flyingarchiecture.com has some good stuff, but it's modeled for Rhino w Vray, but they share the same material files and I believe he has 3DS files of his models, so you could import them into SU and reapply the materials.