If you have a laser cutter sitting around, it’s a simple matter to cut your own enclosure ... it seemed like a short step to using the Eagle files to design the enclosure as well.
He uses a laser cutter to cut Mylar sheets into stencils. [Juan] appears to be using EagleCAD and Express PCB. Both tools are available for free to hobbyists ... exports the files as gerbers ...
I've got a great stenciled sign ready for a classroom ... Another place I love to get Laser cut files is Design Bundles. It has a free download section, including free dxf files and free vectors ...