I'm looking for recommendations on clarinet quartets, quintets, or sextets with 2 bass clarinet parts and the rest on Bb or Eb clarinet. I've played the quartet version of Black by Marc Mellits which has 2 Bb, 2 bass. I love that instrumentation but it doesn't seem very common.

Closest I've found was the Stephen Bates Quartet group, and they have a repertoire list but it appears to be just regular clarinet quartets (4 Bb or 3 Bb 1 Bass) where they just play the lower parts on bass clarinet. I'm sure that works fine but I'm looking for stuff composed or arranged with the intention of 2 Bb 2 bass.

https://www.thestephenbatesquartet.com/

Any suggestions?

Thanks

EDIT: For anyone searching, here's some 2 2 pieces I've found.

Hive by Evan Ziporyn

Ex Machina by Marc Mellits

Quartet for Clarinets by Hans Tobel

Two Rhapsodies on Found Titles by Marc Satterwhite (unconfirmed that it's the correct instrumentation but I was told this)

Plus the Stephen Bates string quartet stuff and Black by Marc Mellits.