A number of years ago I worked with a fellow making several different kinds of gourmet cakes that were shipped around the country. He used a special shipping service provided by the delivery carrier (It might have been UPS, I don't remember anymore) but they provided special custom packaging, and with I believe 4-ounces of dry ice, it could be shipped anywhere in the U.S. for one money. If I remember correctly, the cost of the packaging and shipping came to around $15.00 at that time. Kinda expensive, but it seems people were more than willing to pay up to $50.00 for a gourmet carrot cake, chocolate decadence cake, or cheese cake. It might be a little hard to get people to pay $15.00, or more, shipping charges for a piece of pizza dough. Point is, those Styrofoam containers with a little dry ice really do the trick when it comes to keeping something frozen/cold.
Tom Lehmann/The Dough Doctor