This looks like a really well engineered camper mounting system! It looks like the products they produce are also well built, and the models mounted on the larger class 6 trucks are very impressive.
Here are some pictures.
This is a base put onto the pickup frame, and the mating frame built into the camper base.
The camper offers a larger base than typical US manufactures.
They state that most floorplans offer a forward couch with exterior access to the storage under it. The flat floorplan also offers popular options like rear couch and flip out wall to open the back of the camper.
The manufacture probably does not have the resources to market such campers in the United States. Though they do have a wonderful website, and probably could make something that will fit on a F-350 with a extended chassis.
Fred.