From Art Geek:
Reallusion, Inc. have some made some nice figures from their iClone software available in the 3D warehouse.
Though I find the figures in their fully-texture-mapped regalia a bit corny, I think they look kind of cool when stripped of their textures. It does inspire me a bit to try modeling my own in more detail. SketchUp doesn’t have the best mesh tools (yet; I am guessing iClone use Maya or 3d Studio Max or ZBrush or something) but I have repeatedly been impressed what’s possible in SketchUp.