Missingsteve . Do you know anybody that lives in Madrid ? The reason I ask is that I was thinking this morning of other routes you could take . For example you could try the English language bookshop that doubles as a bar .. J and J books . I´m sure if you could provide them with a small poster with a photo and description they may put it up in the bar . It's VERY popular with Americans : http://www.jandjbooksandcoffee.com/
Also , I studied with a school called Canterbury English in Central Madrid . The students ( of which there are many ) are predominantly North American . They may be able to help you : http://www.canterburytefl.com/
. I assume , also , that you have been in touch with the US Embassy in Madrid . I sincerely hope you find him .