Here is a Githzerai Monk I created for my D&D campaign. It should work for Githzerai and Githyanki, but you be the final judge on that. I haven't seen many minis out there that would work for Gith*, so I thought you may need one as well. Also, I can do special requests if you have any. Just let me know. Also, there's a Dragonborn version of this mini
here, and a human version
here.