Looking for a gas cap for a  '71 Van.  The original disappeared on Halloween
night last fall.  Tried  the auto recycles, parts stores and even a local
antique car swap meet, with no luck to date.  The local VW dealer and
Canadian Tire both tried to sell me a generic cap as listed in their parts
books, but the were the wrong size.- to small in diameter - they would
literally fit inside the filler pipe.  The pipe is 2 1/4" inside diameter.

Any suggestions would be appreciated.
Clark
Red Deer, Alberta, Canada
1971 Camper Van.