Les.
Might I suggest you get hold of a copy of this years, "Folk Music Journal" Somehow. A subscription to EFDSS would do the job.

In it you will find at the back (page 157)a rather excellently written review of a 10 CD set on French music. "Anthologie des musiques traditionelles" From all areas of France and beyond.
There's a link for you too

fremeaux.com

I'm sure it would help your quest.

Happy New Year to you.

Chas