Hi Jerry,
If you can't buy one, then you're going to have to make one.I guess.
If you can scrounge a big old box from some appliance store you should be set if its big enough.Just use the case to mark out the front , back , n sides, score the cardboard n bend...leave extra at each end for the ends.
If you want protection in between, some glued flat slabs of 1" or so polystyrene here n there would give it some space ? ( but allow for it when measuring cardboard )..or wrap it in some carpet scraps?
Necessity is a Mother, as they say.
Lettuce know how you make out,
cheers
franc
This^^^. I have done it many, many times. Buy a roll of the P.O. approved wettable tape with the fiber reinforcement to do the final taping. Build it with plastic tape, but finish and cover everything up with the wettable tape. Makes for a better finished product the P.O. will accept.
JR
