It surely is there, don't worry;
I had the same notion (that there used to be more of them), but I think they just indeed are rare and in some twisted psychological way we just can recall them BEING rather than not.
If in doubt, wizmode like 20 games in which right from the start go to Attnam to the library and there should be a SoCM generated there at least once! And since it doesn't involve wishing, you can be sure those are legit, normal, REAL scrolls that would be also accessible if you didn't wizmode. Just do it, if you need to be assured that badly
.