Where can I get a bicycle shipping box?

The FedEx bike box measures 54 x 8 x 28 (126-inches length plus girth). The ShipBikes xBike Shipper measures 43 x 11 x 32 (129-inches length plus girth) and the BikeFlights medium bike box measures 45 x 12 x 29 (127-inches length plus girth). Each of these boxes meets both FedEx and UPS domestic size standards of 130-inches length plus girth, or less.