what year is your bus. i have a towbar from a 72 crossover, comes complete with the huge brackets that act as both bumper mount and towbar mount (need the bumper plates re welding) Genuine VW fitment as was hard wired into the main harness. No longer got my crossover so not much use to me:
http://forum.earlybay.com/viewtopic.php?f=1&t=21685" onclick="window.open(this.href);return false;