I have Bushwhacker flares all around, and custom mud flaps. I could find nothing ready-made that would work as efficient mud flaps so I bought some big generic big-rig ones from NAPA and then cut out my own and fitted them to the van.
Be aware that if you have mud flaps that are big enough to do any good they can also be torn off - they get caught between the tire and any brush or boulders as you are backing up. I learned that the hard way. My rear mud flaps are mounted way back on the bumper for that reason, and the front mud flaps are kept fastened up against the body/running boards and only let down when I will be driving muddy roads.
