I have had some work done at Garage Laurent in Annecy... it's run by Laurent and his wife. Sounds like you might need bigger repairs that I've ever had, but they'd be the first place I'd go to if I needed anything done.. they've swapped my winter/ summer tyres a couple of times and seem like a decent place.

Also, they introduced me to a nearby panel shop when a truck drove into my car.. so if they can't do it, they tell you where to go.

Their website is of course terrible, but has contact details:

http://www.laurentgarage.fr/

Thanks a lot James!  Really helpful.  Much appreciated