JohnF |
Pathfinder Lost Omens, Maps, Rulebook Subscriber
AFAIK you can't purchase it new - Paizo has not made any of the new promos available (except for including them with any Core or Curse sets purchased as part of a subscription, and handing them out at PaizoCon 2019).
You might be able to find somebody selling one on eBay, but there don't seem to have been any offered recently.
BoardGameGeek shows 10 people looking for one, but nobody offering one.