Andy
I rented a Jodel many moons ago from Lessay. Good location, and cheap. I have since been back there in my own aircraft several times, and it is a very friendly club.
Also try Bernay which have a few Robins I think, and is less than 1 hr drive from Rouen. Not sure what they have at Rouen-Boos itself. Deauville have an Aztec or Apache, amongst other things.
Have fun.