Fly bait is packaged in a can. Stinks like dead animals. You can find it in farm supply stores or where horse supplies are sold. We used to use it in the loafing shed for our cattle. Drew the flies like crazy--just like it does coons. When you open the can, it's blue. There's a couple of different companies that make it. Hardware stores could probably get it for you.
Thanks for the info, I think I know a coon population that could benefit from this concoction.