small update of progress. Was able to get a broken diversity unit. Repaired it and found a cable with similar connectors that didn't take too much effort to modify. the tv functions came to life. Not able to get the composite video-in signal to stablize (or colorize) yet. But almost there.
1-15-2023, after checking packages, I now have 6 XAV-u50 indextron, 1 xav-55n indextron, and 1 xav-u51 indextron. 6 diversty units (also labeled xav-u50 ¿?). 2 original cables, 1 non original made to work.