I haven't talked to him in more than a decade, but Steve Edsey (I think he's in Schaumburg) is a phenomenal prog/metal bassist and very nice guy. He has a band page at
http://www.myspace.com/lucaswhiteedsey but I don't have his contact info. I'm not sure if he's actively teaching, but he was patient, very precise and had monster technique when I knew him.
If you happen to get in touch with him, tell him Winston Berger--Larry Gray's worst student at DePaul--sent you.