idk if it’s available in your country, from here: www.lafeltrinelli.it/bts-best-limited-edition-cd-cd-bts/e/0602435988511?inventoryId=16254350&queryId=a68cce8f685644150b4e73eb117aa7f5
I bought it in an italian store here in Italy, but I think you can also buy it in Amazon or in the Weverse Shop (which is the official BTS store by Hybe) or in any music store