I know of some myself, but those are from 2 years ago and older.
I would love to see a list of the models available for texturing in mods.

I will keep adding to this first post as more are posted or found.
(Screenshot links whenever available as well.)

http://www.gamesas.com/index.php?/topic/1030218-wearable-mesh-resources/page__p__14918230__fromsearch__1&#entry14918230

That's a thread started by Plangkye that lists at least most of the mods with unique meshes. There is a section for BB2 (as well as vanilla & SB), though it includes more than just clothing. Looks to be almost a year since it has been updated, but it should at least get you started.