Since you've already made the character, we'll just run with it. The main race list was not meant to be "this and nothing else" list.
If you'd asked for catfolk, I probably would have suggested my homebrewed rakasta (yet the ECL for that race is so high, it would be problematic). I might have suggested goatfolk as an alternate too sicne it has an LA of +1 as well. However, the official version isn't on the D&D wiki, so you'd have to have a copy of MM3.
You also have the option of using the catfolk traits and playing the race as a rakasta. It's no big deal. It's not like you picked a race that
only found on another continent. (And even that wouldn't have been a big deal if JustinCase had chosen to play a Fallenlanden kenku instead of a regular kunku.)
Just come up with a cool background and you're set. He could be another ex-slave. The group already has two of those. Heh.