Freightliner Trucks
"Building on the highly successful Cascadia platform, the Innovation Truck reflects greater refinement in aerodynamics with the addition of rear wheel fairings to smooth the airflow around the rear wheels, under body panels that smooth air flow under the chassis, a roof deflector to direct air over the trailer, and a front air splitter incorporated into the front bumper to pass air around the truck. "
See that? They are coping us. I don't think their parts are made of coroplast though.