I've just released a new CD (available for download only at this point available as a physical CD or a download), a collection of tunes from centre France, Bretagne, Alsace, and other places ... including a song written by my great grandfather.
Available: http://garychapin.bandcamp.com/
I'll ask for your forbearance in advance -- there's no concertina content. I've had good conversations with some on this list who might be interested.
Thanks and apologies!