You aren't too far away from Beloit, I don't know if you've ever heard of it.
We have a *new* group forming here right now. They are mostly the girlfriends of some of the fraternity guys. They didn't find their home at the NPC, or the local. I would talk to your friends. Girls who hang out in fraternity houses. etc. Your school sounds like mine and when you target those women you get people who already accept (in most cases) Greek life, simply because they see what others get out of it. Does that make sense? Also, if you know any women who depledged from the locals or even the NPC i guess because of the hazing, they might be willing to fight for a new group. Ask around, find out who left for the same reasons you did, there are probably more than just you. Talk to them. Once you get a couple, hold some open campus info meetings. Does this help?
Good Luck!
Lil E