Since you are interested in Harris: The Kugels Play Klezmer, here is a list of other items that you may find interesting.
Klezmer: Tradition / In the Fiddler's House / Live [3 CD set]
Itzhak Perlman (violin) with Klezmer Conservatory Band, Israel Philharmonic Orchestra
[ Itzhak Perlman complete Warner Recordings / 3 CD - released 16/Oct/2015 ]
Itzhak Perlman's parents were from Poland and in these albums he explores the secular music of Eastern Europe's Jews. Its sinuous melodies and piquant harmonies fuse elements of Slavic, Balkan, Greek and Turkish music - and, in its American...