try the "Marktplatz" link right here; this is the audiv8.com parts exchange. There`s some guys who repeatedly dismantle V8s and put up parts for sale.

In case you don`t speak German, "Biete" means "for sale", whereas "suche" means "wanted. "Gebrauchtteile" is "used parts".

You might also try eBay.de, but beware, especially if you don`t speak German.