I'll take a look, if you have any resources for the UT2K4 audio it would help a lot! Even a youtube video of all the voices without any messy background noise or game audio over it is pretty useful.

As far as female voices go, I will be working on Nisha and Athena from Borderlands: The Pre Sequel in the near future. Nisha in particular sounds great and has a lot of fun lines to work with, while Athena is much more just-business sounding. Unfortunately I don't think that Maya from Borderlands 2 has enough material for a reasonably complete voice pack, but I'll give her audio another look tomorrow.