Etsy user Jake Vadnais is a leather maker who specializes in geek-themed wallets and keychains. His wares are sold as quickly as they appear, so you won't find anything on his shop page currently. However, you can see some of his past works here, which include designs based on Adventure Time, Minecraft, Harry Potter, StarCraft, and The Legend of Zelda. Each item is unique, even if some are based on the same general design, like the Deku Tree wallets.
But this Majora's Mask wallet... my God. It's staring right into my soul, compelling me to spend all my money in three days. Why would you ever want to stuff such an object of beauty with plastic and bills to the point of bursting? I would never!
Get In My Pocket!: Impressive Majora's Mask Wallet [Geekologie]