I dont't know of any sites where the models are already set up for ya, but did you try the links I offered?

Again, here are the links:
MakeHuman (FREE!) exports .obj, and collada formats
- http://www.dedalo-3d.com/download.php
TrueBones cheap .bvh mocap animations - http://www.truebones.com/index.htm

Please try these links. Oh, and what 3d modeling program/s do you have? If you could also tell me the formats they support, that would be helpful too.

Wait, I just checked out a site I haven't been to for a long time.

It's called
http://store.got3d.com/3d-models.html#misc-3d-Models

- they sell 8 pre-animated human models in a pack called the Casual Revolution Series. Not sure of the poly count, but it costs $195. They have other packs too, like low-poly trees (150 low-poly trees for $195), and low-poly non-animated humans (30 low-poly humans for $235) and many other models and textures too. It looks as though the models will come with their textured UVmaps.