Just turn it in to a positive. They don't have to ship the tires to each individual buyer, but have them delivered to a few regional sites, then have the buyers drive their Cobra there and you get them mounted and road force balanced all at the same time while you wait.
Voila! Problem solved. With my pin drives and large calipers just getting the tires balanced and mounted properly was most of the PITA.
PS - I'll take 10% for solving your problem for you, thank you very much.