Several years ago I had a friend who worked in the fabric department of Hobby Lobby. At that time they reordered bolts as needed, but they also got what she called "send outs", which came from headquarters supposedly randomly. Those bolts were a one time deal for each store.
Since you are looking for a solid, I would think that would not be a "send out", but would instead be a staple. Unfortunately if you consider how Hobby Lobby has such a manual style cash register system, I can't imagine how difficult it must be to keep up with inventory. Do they just collect the cardboards once the bolts are empty and then place an order periodically?