I saw one of these in Blaine, Washington on Aug 2, 2017. The metal door on the driver's side near the wheels had two 20 lb propane bottles. Incase you cannot read the small print is is a ZOMBIE APOCALYPSE EDITION.
This link is to a youtube walk around of the vehicle.
Seaside, OR Zombie Apocalypse EditionAnother one from Germany in 2018 - Crew Cab with interior walkthru.
Fuso Class C Conversion VideoThe truck is a Mitsubishi Fuso 4x4. They are in the near 16,000 lb GVWR/CGWR range. About 20-26 ft long.