Follow-Up:
The Chinook is one that I've seen, and like PJ said, the Isata is another, but Isatas are very rare and quite pricey. However, the problems that most Rialta owners are having with VW is no different than what most bigger RV owners are having with Ford, Chevy, and Dodge dealerships, relatively speaking. Most service centers are not equipped to handle the large RVs and will turn you away even when you're stranded.
Here is a link that might be useful: www.MotorHomepage.com