Homebrew........
I never shipped BBQ, so I don't have a shipping method........I just figured I'd solve that problem at the last minute.
I have received mail order oysters before, so I think I'd borrow a page from their book and pack the ribs (vacuum sealed) in a foam insulation with ice packs.
I usually have some throw away ice packs handy from my wife's insulin shipments.
I figure in the spring, I might get away with two day shipping.
If I were to ship them today (from PA to WI) they could most likely go priority mail, and they would probably freeze in transit.
Have you contacted any custom packaging people???