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.