I bought my hard doors from a guy in NY. I'm in AZ. He made a crate of sorts out of wood, maybe pallets. He used bubble wrap between the doors, insides facing each other, then wrapped them together with plastic wrap. Surrounded the doors with cardboard wrapped with packing tape and inserted into the wooden crate. Wrapped the crate with more plastic wrap. It took me about 30 mins. to unwrap everything but the doors were in great shape. They were shipped by UPS.
I would rather have a tool I don't need, than need a tool I don't have.