You asked for it and so here it is, thanks once again to Chris Brown, Exhibit 46 [PDF] complete, the list of SCOsource potential victims, with SCO's notes on who was following up and what happened.
Here's what mostly seems to have happened, by the way: nothing. Either the company had gone out of business, and left no trace, or it had stopped using SCO software. Or at least that's what they told SCO when it came calling. Evidently, SCO had fewer licensees than it thought when this all began. Sometimes no one answered the phone after they got the letter. A few sent letters back saying they were in compliance.
Some SCO executives had some difficulty recalling precisely who worked in the SCOsource division, so I found it of interest that Gregory Blepp apparently helped out. If you look at the last entries, you find a notation that he is reviewing certain companies on the list.
It's a large document, 3.1 MB, so fair warning to those on dialup. Enjoy!