You should contact Henry Sapoznik--https://www.facebook.com/henry.sapoznik As some of us at least know, he wrote the book about it (Klezmer: From Old World to Our World) and did the Yiddish Radio Project for NPR, started Klezkamp, played klezmusic in Kapelye, and probably started the somewhat annoying custom of using "klez-" as a prefix. If he can't tell you more about this, he knows someone who can.