Well, i think you are out of luck. Unless you can make a mod, and have people download it.... or write to lucas arts and complain.... or write a script, that changes you skin, then taunts, then changes it back very fast. As far as i can tell, you can't "link" another taunt from a skin if you aren't using that skin.... since the taunt audio file is in the pk3 files where the art/skin is for the model.
But I've heard them on many an occasion. A female skin with a male taunt. I'll just have to ask them next time I come across it.