I see a CD announced with music for clarinet and strings by Adolf Busch (a work for strings- his serenade for quartet- also a set of variations for clarinet quintet - and also: his bagatelles for clarinet, viola and cello; a duet for violin and clarinet, and German Dances for clarinet, violin and cello.) This on the CAvi label, played by the Eisler Quartet and clarinetist Wolfgang Meyer - see e.g. MDT (http://www.mdt.co.uk/busch-adolf-chamber-music-for-wolfgang-meyer-eisler-quartett-c-avi.html) or CD Universe (http://www.cduniverse.com/productinfo.asp?pid=8851739), also ClassicsOnline (http://www.classicsonline.com/catalogue/product.aspx?pid=1765034). (Already at Records International (http://www.recordsinternational.com/cd.php?cd=03O067), so maybe someone mentioned it already...)