In the northern areas of the U.S. a similar product is called a "Scooter Pie" and there is also a single-cracker marshmallow cookie called "Mallomars".
Some South Korean and Taiwanese companies produce "Choco pies", and in Mexico there are similar cookie pies called "Mamut" (Spanish for "Mammoth", sold by Gamesa), and "Rocko" (marketed by Marinela); there are several other minor brands as well.