I always hated the lack of alien species to play as your PC and to be honest, most alien-head mods I tried weren't satisfying eighter.
So I'm working on several alien-heads at the moment with plans to release a mod, that adds most alien species that are in the game as playable PC heads.
Before you think, these won't be the boring full-body models where you can't see any cloth-changes at all and half the animations not working.
I'm actually very close to have a fully working Weequay-head on a normal human body (wich I'll tweak yet to match a Weeqay-body of course), the only thing missing at the moment are the facial animations, but once I can find the right hex-edit, it should be fully operational. The same method should work on all other heads as well, so I'll be able to include all species with near-human bodys.
The three species that already have head-only models I'm remaking into more individual heads, here are a few screenies of my Zabrak, Devaronian and female Twi'lek: