Mother never came to the United States, though Mother 2 was released as Earthbound on SNES in North America, and will see a Wii U Virtual Console port this year. The game that followed in the series, Mother 3 for Game Boy Advance, also never saw official North American localization, though fan translators of the game offered Nintendo to use their work free of charge for further Virtual Console localization purposes.
As for Rose Colored Gaming's gorgeous Earthbound Zero reproduction cart, there's no price listed yet on its store as it's working to produce "as many of these as possible for as long as possible." We're just saying, this collectible item would be a great gift for a sorrowful Joystiq editor that has lost hope that any future iterations of the series will come to life in a language they understand.
[Thanks, Wes!] %Gallery-192781%