I have a GE roundie. I found it in a construction roll-off dumpster last year. It's in terrible shape, and the cabinet is scraped up real bad on the top, and the glue joints are all coming apart. It needs some serious work. I haven't done anything with it at all, since it's missing the horizontal output tube and I don't have a replacement.
Here's some pictures I posted when I first found it:
http://www.audiokarma.org/forums/showthread.php?t=84840
I also have an empty GE roundie cabinet (different tuner mounting than the one I found all banged up in the dumpster, so not easily compatible) that I found along the side of the road - but no innerworkings at all.
These are the closest things I've found yet to a standalone round color set. Both GE. (Living three miles from the main GE plant in Schenectady, NY might have something to do with it, however.)
-Ian