Many thanks to all so far and especially to Allen for all the links:

One or two of the Matamaros pieces might I think form part of a Klezmer repertoire although many, especially the slower pieces, seem to be versions of liturgical Hasidic melodies of the type mentioned by Fogie. I'll look at the Burning Bush catalogue as it's those beautiful, moving, melodic pieces I'm especially interested in.

Peace,

moo