If all else fails, go to U-Haul and get one of their garment boxes with the hanger attached up top. If that's not big enough, I can't help you any further! You could probably put 2 seats in that thing. You could include 6 briskets and 4 pork shoulders in the garment box with the seat. Have him smoke the briskets while he installs your seat.......(Make sure he pays you for the meat).
It will be no problem finding a box, but check USPS for shipping rates it is the same as UPS but you can get it over night for the same
price that is what I did with Gl1800 seat.
UPS was five days from Virginia to OK.