Three years late to the party...
Here's a link to the FieldSleeper camper that the company advertises for USA
http://www.tonke.eu/us/collection/silverline
The primary difference is a reworked electrical system to provide 120V in the camper, instead of the worldwide standard 240V.
Tonke states they are willing to undertake custom work
Here's an updated look at Tonke's system to separate the camper from the truck chassis. Slick!
https://www.youtube.com/watch?v=C9WyXeaZwtE
Dismounted, the camper and truck chassis can be slipped into a 40 ft shipping container.