Where about in Spain are you? Fellow RVOC member has in his signature links to BOTH LPG locations in Spain and Europe.
Hmmm I think Larry what our man also needs which is being missed by all is the US tank fitting to the Euro fitting so an 'Acme' fitting to whatever other country he is in, so ideal set would be this one but showing as out of stock.......Have a look here
The euro one is the Spanish ,
Hi mark , had the same problem , you need an ACME adaptor with a rear screw thread to fit a ordinary coupler to ,fortunately i found a B.P. Garage in Fuengirola with the correct fittings, i dont know if all BP garages have the same ones ....worth a try ,...cheers