It's essentially just a bunch of stacked boxes but that simplicity is really what makes it so functional. I have sketches of a frame with 'truck boxes' attached that nets the same design. But for me, even the half-dozen truck boxes were too expensive, although still cheaper than an imported Aussie or S.A. trailer. Obviously, if I bent my own boxes, it could be done cheaper. The design requires some sheet stock to bridge some gaps, so the materials are there. There are a few metal-working companies that could act as the supplier, and I could just assemble. Anyway, IMO it's not that difficult to put together something for yourselves.
