I actually have two of these modules, one I purchased in a blue 2-15's cabinet and the other bought separately. It seemed to me to be a waste to have only 1 speaker cabinet dedicated to this amp, not to mention the additional weight. I took it out and built a cabinet for it that included an internal fan, accessible fuse, grounded plug and an on/off switch. Cabinet is covered in the charcoal gray carpet that was used in some of the later Kustom power mixers. I even found some Kustom decals as an added touch. Now instead of dragging two K-250 heads around to go with my (2) 2-15's cabinets I only need the one and the module. I will try to post pictures once I have reached the required posts to do so.
It is heavy but has surprising few components. Really wouldn't take much to reproduce one if parts are still available.