Anybody know if a 2001 OEM roof rack will fit other year/models?

I have a roof rack that came off of a 2001 Audi A6. It is a Thule Original Equipment rack, so Thule provided no help at all. I was wondering if anybody knew of the base system and feet will fit any other years and/or models.|||That body style ran from 1998-2004 and had minimal changes so the roof rack will fit those years.