I dont know of specific sites for a camper but here are some that might lead you in the right direction.

Airkewld

TheSamba.com :: Volkswagen Classifieds, photos, shows, forums, and information
They have good classifieds for aircooleds

VW camper parts and VW replacement canvas tops for the 1968-73 Volkswagen Westfalia.: VW Parts, Volkswagen Parts, VW Bug Parts, VW Bus Parts

BusDepot.com - VW Bus / Camper / Vanagon / EuroVan Specialists

That should help you out for a bit.

Did you sell the bug to someone on TR? and post some pics of the bus