That's very close to my hometown of Terre Haute, Indiana.
I will be going up there for my daughters wedding next weekend.
I don't know what help I can be, but I wont confront the guy, but if something would be dropped off (ie pool hall somewhere), I would pick it up and mail it to you myself.
I don't have a dog in this hunt, but I hate to see anyone get ripped off.
My recommendation, is call city police, sherriff, state police, and start down the path with the post office. Unlike the poster above me, I have nothing good to say about the post office, but it is another way to try to get pressure applied.
I wish you the best,
Ken