I have a deal that I made myself.
It's a piece of angle iron that spans the full width of the truck.Attached (bolted) to that is what's called Hula Skirt.It's the same tough nylon "mudflaps" that UPS uses on it's long haul trailers.I got mine from JC whitney.
It attaches to the hitch with a 2"-female that's welded to the angle iron-dead center.
IBC Brush-type Splash Guard/Mud flaps
Mine is just like this.It might weigh 5 #.I use it all the time and it's 15 yrs old.PS-this one is a deal-buy it and never regret it.