I am not currently there, but try the Institute of European Studies (Headquarters are in Chicago). You can opt to take all University courses if you want. I think I stillhave their office number and address in Salamanca at home, although it may have changed since I was there.

You might also want to check out some of the Study Abroad departments at universities. i know UCLA uses different programs like CIEE, ISEP, etc. and can offer you links to diff. programs.