One thing that I have managed is to get Lou to try and accept a range of cheeses. Even stinky blue ones. There's one thing we're in agreement on in France. In spite of the massive range of truly excellent from age on offer, nothing comes close to being as good a cooking cheese as the vintage cheddar that we brought to use up from home. It set off the lovely ham in our home prepared galettes so nicely. Emmental (known to Lou as rat cheese) and Comte just don't have the same potency that we know and love. Sacrilege! We've resorted to pre shaved Parmesan from the supermarket as a substitute. Acceptable yes, but it's come at a cost both financially and in terms trying to source locally.
If anyone has any ideas about an acceptable French cheddar substitute let me know. Otherwise I'll have to stock the van with a bigger block next time.