Kar,
I have always found OfficeTeam almost everywhere I've lived. You might want to give them a try.
Next suggestion, go to
www.iaap-hq.org. On the home page scroll down until you see Chapter websites on the left-hand side. There should be some IAAP chapters listed in the Chicago area. Contact someone with the chapters and ask for assistance. The members of IAAP can be a great resource.
Next, pull up the local Chicago Sunday paper and check the classified ads. And after you have reviewed those, go to monster.com -- select the area of work and the city/state and see what's out there.
Good luck.