Any places in Chicago where you can rent camera's?

I have my first major shoot this Saturday and I own a Nikon P90 but I feel it is not very appropriate for an event like this and it won't give me the most successful pictures I want. I tried rent a center but they don't have cameras of any sort. I would preferably want a camera like a nikon d50 or a d3000 or Canon. I would really appreciate your help.

Helix

See pgs 100, 101, + 102 below:

http://www.helixcamera.com/rental/rentalcatalog_0104.pdf