The best of the best:
Nobuyoshi Tamura (8th Dan Aikikai Shihan) teaches in france:
24 Chemin des 4 Platanes
83470 St. Maximin, France
As well as I know, they don't have an e-mail address. Please write him in polite french and he may let you practice there. He teaches regulary every Wednsday and Thursday but he goes often to give seminars, so it is important to make sure he is there.
The dojo is about an hour from Marseiles, at a small village called Bras (9 Km from St. Maximin).
Good luck. he is really fantastic.