I live in Paris too and I agree it's very hard to find trustable curly hair products..
I'm sorry I can't help you with products yet because I haven't find none... I co-wash my hair with an "ultra-doux" CO...
after washing I put a leave-in product named "Small Talk" which I found in internet but I'm looking for something better. My hair still goes from 3b to 3-b-almost-c according to it's humour and I can't find a product to really help me with it. Most of the mousses just let it too "gonflés" (puffy?!).
And for the salon I've just given up and began to cut my own hair. They can only deal with straight hair, is soooo difficult and TOO EXPENSIVE to find a coiffeur who understands about curly hair...