My favorite chain for equipment and materials is Calumet Photographic. I know they have a store in Chicago (I remember scouting out photo stores online when I visited a few months ago). With any luck it's as good as the Philadelphia one and has lots of stuff . I don't think they do development services, though. http://www.calumetphoto.com/ctl?ac.ui.pn=compinfo.CompStoreLocDetail&ac.comp.locID=CH