By 2014, I was doing 3D modeling.
I didn't have an aerodynamic truck to put it on, and it wasn't fitted to the cab, but it was sort of a bulked up aerocap.
I had a friend who in the 1970s built an egg-shaped camper [with cab-over bunk] on a custom flatbed with curved sides. Last I'd heard it went to ground somewhere beside Beaver Creek in the Coast Range.