ISO bass trombone rental in Barcelona, Spain

[carlbone]

Does anyone have a recommendation for a music store in Barcelona that might have a bass trombone to rent in Barcelona? I will be vacationing there June 20 - 27 and would love to find a place where I could rent a horn and a practice room about an hour each day. A quick internet search comes up with mostly guitar stores. I will take my mouthpiece and a length of tubing to buzz on the mouthpiece, but that gets old real fast and I would love to find a real horn to keep my chops up. Any ideas?