NEMO would probably be a great place to start. (
http://www.firstnemo.org/resources.htm)
As for businesses, ask anyone and everyone. Truth be told I would kill to have a marketing person as a mentor. Remember, FRC isn't just about robots. It is about inspiring students. Besides, RUSH had a few years we were sponsored partially by an orchard. Everything helps, be it monetary or maybe they just give you space to store your stuff. We had a couple years where we had a playing field in an empty bay at a local fire station.
Do you know of any teams in the area whose team contact you could contact?
Best of luck, I hope to see you in competition next year.
PS: off season competitions can be great to bring potential sponsors to. Even if you aren't competing it gives them a chance to see robots at their peak (and in some of cases their competitors names on the robots) .