Here is the leaked P-1000 Skin, which will be available as an upcoming challenge pack called “Traveler”.
Epic are always adding new cosmetics to Fortnite and these are usually added in new updates that require some downtime. There are many different ways in which you can purchase these new cosmetics, with some being available in the Item Shop to purchase with V-Bucks and some available in store to purchase as a bundle.
There are many different types of Fortnite Cosmetics Bundles that have been introduced, with one of them being Challenge Packs. In these packs, you will get a Skin upon purchasing the bundle and also challenges where you can earn V-Bucks.