In reply to Andrew Wilson:
Jerry uses the Renault garage in les Vigneaux
To be honest there are loads of garages around Briancon and I would think it's more a case of who has space and time to fit you in. If your sure its the wheel bearing then you should be ok, if you where looking for diagnostics then maybe there are only a few who are really good at that.
The garage in Les Vigneaux are good but don't move quickly, tends to be a case of leave the car and they will get round to it when they can. Garage SILVESTRE ET FILS in Briancon is good also and quick but you tend to have to wait a while to get an appointment.
Hope you get it sorted