I can send you plans to make your own from a sheet of plywood. You just have to find someone to make the steel pan on top. It won't be purdy but it cooks a pig.
ETA: I'll even build it for you, but you would have to find someone to weld a steel pan for the top. I'm working on tweaking the design to work with disposable aluminum trays, but am not sure it would hold the heat in well enough.
This post was edited on 11/21 at 12:03 pm