While I was at the BC Overland Rally in Merrit I discovered a very innovative, modern ultra lightweight solution for fullsize and midsize trucks.
The EXP-1 is a full size overcab expedition unit designed for longbox truck / trailer installation.
Using the information and experiences from the industrial market ArmorLite has designed two of the most advanced expedition style units on the market. Built with our standard Exobody construction techniques the EXP-1 is built for full size truck and trailer installation while the EXP-2 was designed for the mid size truck market.

Here's their webiste to learn more:

https://www.armorlitetech.com/