UPDATE:
This plugin is at least semi-functional. Gmod models are a no-go but check this shit out:
http://s-low.net/forum/There are a ton of models here, there were also a bunch on our fastDL already, so I will be setting up some of those first for the sake of testing.
NOTE:
I am placing a limit of 8 models on the server. I don't want people rage-disconnecting because they are downloading for days, and I reserve the right to remove models if it turns out their file size is very large (like the one on that link for Dante from DMC4)