This doesn't answer your specific question about France. However I suggest you check out Auto Europe. They are wholesellers and their prices are good. http://www.autoeurope.ca/

They quote inclusive prices as well as basic prices. Last year, I checked out quite a few sites, travel sites such as Travelocity as well as individual car rental companies and found them the best. It is *so* hard to figure out what is included or not on some sites.

Note that your son's rental will be with a "big name" car rental company. Auto Europe is the agent. Prices can change from time to time so if you don't like the price, check back before you make your final booking.

Frances Toronto, Canada