The short answer is probably no, as a moderator here, we cannot migrate a question that has aged past 60 days. Also, we can’t pull questions, so they (SO Moderators and users) would have to send it over, assuming they both can and wish to.
The exception for employees migrating seems to be not something they entertain requests and only do it in extenuating circumstances when they need to move something as opposed when we want to see it moved.
What we can do is be sure that (if needed, a new question gets asked here and) the contents of that other answer get replicated here (giving credit / attribution of course) so that no matter what happens in terms of deletion and closure on the other site, we have an on topic question with a correct answer.
You are correct in the general case, we would prefer to migrate if we could, but I believe we cannot accomplish that even if we wanted to in this specific case.