Just talking to a guy yesterday about this issue. This is where I would start:
Search Caravans and Motorhomes on mobile.de
Search on 'Alkoven' for what is called a Class C in the USA. They also build Class A's on the Sprinter chassis--Integrated.
German RV manufactures produce really high quality stuff. Much better than the US from what I've seen. Buy used in Germany, fly over to purchase it, drive it around Europe for a few months, and then ship it home.