Hi, don't know if you can actually schedule any visit... but you can always try to find the secondhand store where the "Michel Ancel Rayman 4" statue is located and which we found on twooccasions during our own vacations there.
I don't have tips for the studio, but I hope you will survive the amount of lazy beggars (punks à chien) that I remember were absolutely everywhere in that poor city. At least it has some nice architecture and the sea close by...