@FlamingoKicker1, my understanding is it should be there. Maybe in the ghost's inventory or in the household inventory for the house where the deceased lived if other living folks still live there?
Used to be that only active sims or those who died on the active lot generated tombstones, but I guess that was changed in a patch a year or so ago. I did a google search on this just a few days ago myself. One thing I can tell you is that the google search revealed a lot of people have problems finding urns/tombstones in circumstances where a ghost dies off-lot.
Summoning the ghost to your lot, bring them back from the dead, and then re-killing them with MCCC seems to be a popular solution. The mod to show sim info is a good tool to use to find where the ghost is, if you are willing to use mods. You could install the mod, find the ghost, and then uninstall the mod even, if you aren't down with using mods.
