I was at a local wrecking yard this weekend and came across a propane tank 
for an early Westfalia. I'm not sure how early, but the style was different 
from any that I've seen. The tank was about 10" in diameter and maybe 16" 
tall with a flat base. Connections were on top of the tank. The tank looked 
to be in very good condition on the surface, but I didn't inspect it 
carefully. They wanted $100. If sincerely interested email me and I'll give 
you details about who to contact.

-Mark McCulley