This is not possible (perhaps not eveneven if you are a mod).
You might get lucky and see if some user gets an announcer/booster badge for your question, but that will get you a user (and therefore a link) butand not its location.
You could try:
- looking up its URL in a search engine and see if it's linked on a page out there in the wilderness
- scan Twitterverse for possible hints or mentions
- reddit via reddit.com/domain/superuser.com/?sort=new