I went to have my propane tank filled today on my '89 westy and ended up
spending most of the afternoon at my local purveyor of propane and propane
accessories all to no avail.  Apparently there's something wrong with the
fill valve.  Anybody know a source for this part?(new or used)  The local
propane and RV places are stumped.  Bus depot only sells the whole
tank($220)  When they fill it the gas just leaks back out though a vent in
the side of the valve.  These guys seem to know their stuff and they say it
shouldn't do this.
-Michael