Hello Becca - from another Illinoisan. I've been all over rural Illinois but I must confess to never having heard of Bone Gap - so indeed I had to look it up!!! Of course, few people who live within 50 miles of me have not heard of my town either.
Lots of great people here on the board!!!
As for the charms for the crazy quilt ... I know I've seen vendors sell them at quilt shows. I know I saw one in Paducah when I was there a few years ago, and at a show in Decatur - both probably equal distance from you. I haven't been to the show in Arthur yet but they might have a vendor there as well. I'm sure there are online shops as well - but I can't think of any.