Jim Greenwood in Kansas is the best stock fitter I know of. He makes a pattern stock first to make sure it’s right for you. He’s a pro. Champlin’s in Enid have a good reputation and I’ve made some deals with George, but I have no experience with the gunsmith, JJ but he has a good reputation.
Greenwood looks like a good option, I'll get in touch with him and see what he thinks.
Find someone close to you wherever you live in Illinois so you can drive in less than a day. Google is your friend and Trapshooters.com will get you numerous recommendations. There are a lot of guys out there who do this as a sideline and are relatively unknown in the wider world. Many do excellent work for less than the price of a nationally known stocker.
I live within an easy day's drive of Doug Mann, who's listed in the gunmaker's guild directory. Has anyone had any work done by him? I see some work done by him on various sites but can't tell if he does fitting as well.