Do you have more useful links for models, textures or anything at all? So far I've found these:

http://shub-hub.com/files/
http://w1.470.telia.com/~u47016112/quake/index.html
http://hem.passagen.se/bugsy/qwgfx/
http://www.kolumbus.fi/ruohis/home.htm
http://facelift.quakedev.com/
http://gfx.quakeworld.nu/
http://quakeremodeled.planetquake.gamespy.com/
http://members.optusnet.com.au/~plaguespak/
http://www.quaketastic.com/

When I was more active back in the days there was tons of sites and stuff. I just love modding quake, rarely play though. ;D

http://www.primevil.fr/