Think I got everyone on their who requested in the thread (just ping me if I missed you).
At minimum it seems like they could always release a slightly modified version later -- e.g. a different back -- so people could at least get the artwork but then there would be something unique for the show. Still, I would think as long as people are willing to buy 'em, why not make them available to all? If the cost was the same or more than the show's admission fee, then there would be incentive to go that route, but for those for whom the trip is impossible (I'm some 1500+ miles away) it doesn't seem unreasonable to want to buy them.