Forward Mud Flap for Rear Wheels

Recent new Bronco Wildtrack Sasquatch owner. I installed mud flaps (where they are usually located) but am noticing alot of driveway/road debris, kicked up from my rear tires, sitting on my running board. Small stones, dirt and what looks to be sand residue. Do they make some sort of flap/cover to close up the gap between my wheel fender & running board? Thanks.