I bought a kit for a SS one and built it. It needs a better antenna than the 3-ft. wire that's, uh, 'allowed.'
Prior to that I had collected parts for a Lil 7 that are still laying around, in case anyone is interested in that one. Not that easy to find a 120-120V isolation transformer in a small size. I found one that also has a 6V winding for an indicator lamp.