See the 3D design here.

I designed a new housing for it to be more aesthetically pleasing and with small improvements. I moved the copper screw hole closer to the front so the thermoelectric generator sits it a more optimal place between the copper and the heat sink. Secondly I raised the assembly a bit higher so the copper would  not be touching the surface of the table.

This was modeled in Autodesk Fusion 360, and printed with with a Craftbot + with PLA. The print time was about 20 hours. There are standoffs built for a 40mm x 60mm prototype circuit board.