Oh. No it's more of a improportionate work to output ratio. That would be a quite a few models to modify, and no one really has wanted it so much they'd be willing to do all that work - that's my guess anyways.
Most modeling mods have to do with lightsabers or new weapons. A few new head models, some areas, but that's basically it. People have stopped doing body models it seems. It's hard to get them to export right sometimes, I guess. The last models I made though were easy enough, I just have alot on my hands right now...