I believe NalleyRacing is working on this also, you might check with him. Google shipping boxes, new ones aren't real expensive and may be sent to your door.
The ones I got from DSS were packed with paper and foam board, the ones from Yamiya were bagged and spray foam was used between them in the box. I think they were layered with two on the bottom, like yin and yang, then cardboard and two in the top layer.