I am amazed to find that the German EBay has a MASSIVE amount of kit for M/B's on offer.
Wheels, Spares Etc. Over 8,000 at the moment.
I can hear you saying "I don't speak German"
No problem - use Bablefish to translate it for you. http://world.altavista.com/
Quite a few see no problem shipping overseas.
Take a Look.
EBay Mercedes Germany