Try this link:
ftp://maikhaas.dyndns.org/Volume_1/S...COMMUNITYMODS/
Scroll down to Tomi's folder in the list. You'll pretty much find every mod released for SH3 here, a sterling collection. As far as models are concerned, there aren't that many, but if you want skins, I recommend Fubars, also available through the above link.
Enjoy.