Last edited by Merp; 27-Jul-2016 at 00:43.
You could try putting a message on the Spanish ABDL site diaperforo.org (google translate is your friend) people on there will know the best shops
Great suggestion sambus. I wish I could give you better directions, but I stayed near the bull-fighting stadium a couple of years ago. A few blocks from the stadium was a grocery store with a GREAT selection of diapers, including youth-sized plastic diapers! I was in heaven. In fact, I still have some of the diapers for nostalgia's sake that I bought while there.