I've been working with audio for quite a while, i can produce all kinds of effects and have the fpsc itself so i understand how it all works.
I guess you could say i have a team but it's really just my family (including female voices).
Were all english and i (male) can immitate American accent perfectly (just give us some warmup time :p).
Im 17 and have a "young male" voice, but all this can be sorted just by decreasing the pitch, speed etc.
I can immitate those burly black guys you see on tv like Mr T.
If you need echoe's, reverb, amplification, robotic or whatever I got all the right software and i can spit the files out in ANY audio format.
(For a very small fee i can batch convert audio)
Since i've not done this kind of thing properly before except for my own games, i am offering this for free. Once i feel i have become somewhat pro i may start charging. I love doing voices anyway and can act! Which is something even proffesional game voicers lack... a lot.
If i get round to it i may post a preview download or something.
Anyhoo, contact krazyjakee@aol.com, send screenshots, scripts or whatever alongside the request.