You might try taking a look at this site: http://www.auto-ecole.org/. They have a search function where you can find all the auto-écoles in your département. Only a few of them seem to have websites.

I get the feeling that the auto-écoles are one of those protected industries here in France. They all seem to charge about the same fees for lessons, and the small, single-owner shops simply have no ability to deal with foreigners in any language other than French.

What some folks do is to go back to the US to one of the states that has reciprocity with France and use the address of a friend or family member to get an exchangeable license.
Cheers,
Bev