I’ve been looking around for somewhere that is selling a hitbox or somewhere that can make it for me. Those things look awesome. And I want one very badly.
http://hitboxarcade.com for the official Hit Box.
Currently, they only have them for sale in PS3 version. They plan to get a PS3/360 version out as soon as PS360+ goes up for sale.
Now, many custom builders will build you a Hit Box-style box, but it may not be “the” official Hit Box layout. Naturally, though, if you go with a custom builder, they will be able to make it for any system you want.
Or you can buy the PS3 version now and Dual Mod it, or hire a modder to Dual Mod it for you.