Hey All! I know this a VW forum, but I'm a desperate man in need of an Audi part...

Aside from usual sources like eBay that I'm always watching, VW Classics, Audi Classics (that have helped with certain parts), any other oddball good sources of parts? I'm specifically looking for a rear window seal for Audi Fox/80 (posted in WTB), and I have been everywhere that I know, but there must be other interesting sources.....??

Thank you!