Trovesi is the one coming to mind here first... but I couldn't point you to a particular disc where he uses it... he plays some kind of sopranino clarinet (not sure what it really is, Eb clarinet, A clarinet, C clarinet... there's all kinds of, but it's shorter and higher pitched than the regular Bb clarinet), alto and bass clarinets, as well as alto sax, but rarely seems to play the regular (Bb) clarinet.