I suspect they don't. They haven't been added to the drop tables, so we can't verify, but it seems they didn't actually adjust the drop chances like they said they did in the patch notes (the pod and engine originally had a lower drop chance).

Logging out and back in fixed it for me.

I does appear that they don't spawn in the Kullervo version.

There was a somachord and one of the quiz tablets in there in Duviri experience.