The obvious answer is PBHQ? But what is your goal in getting one? Better looks? Aggregated packaging? Aiming for Better print quality by *enclosing* the workspace? If the latter is your goal, consider it carefully.
Since
Brook has repeatedly said that PB is a fully open source company, you can just ask at
info@printrbot.com for a DXF of the file for the PrintrBox, and have it cut locally. I'd have thought that file or files would be posted on their website and thingiverse by now!
Right next to the Ubis hot end details
CL1