Only available in Japan, unfortunately (check the via link for more).
There's plenty of more Mario swag here, however!
Oh the things you can do with a 3D printer!
Game enthusiast and modder RetroBrad developed a re-make of Super Mario Brothers using an eight-by-eight pixel screen. The game is kept largely in-tact by condensing characters and environments into simple single-pixel creations. Way rad!
This Mario-themed custom gun by Kodykoala is one of the most unique Nerf mods we've ever seen.