Go to mrboxonline.com. They will custom make any size box at a reasonable price and send it to you. They also have packing materials.
I purchased made-to-order double boxes and styrofoam sheets from them to pack & ship a pair of Dunlavy IV-A speakers to England. Nice price and nice people. (Fortunately, for me, they are local and I could pick up the boxes.)
I purchased made-to-order double boxes and styrofoam sheets from them to pack & ship a pair of Dunlavy IV-A speakers to England. Nice price and nice people. (Fortunately, for me, they are local and I could pick up the boxes.)