In reply to Jon:
Looks a nice leafy suburb.. Thanks.
I did do an investigation on google maps too and came to a similar conclusion and also rang them up to chat about my visit. Unfortunately my 'Franglais' wasn't quite good enough to get me understood, or perhaps they weren't very interested (probably understandably).
I might just take pot luck and try to find Roche aux Sabots at Font if that's where the resoling van is parked up.