All right so I talked with my uncle today for a little while. He bought everything he needed from the ford dealership (front end dually wheel kit, rear end dually wheel kit, the rear dually fenders and the wiring harness for the two lights on each side) He couldn't remember exactly how much he spent, but he said somewhere between $800-$1100. Here are some of the pics of his harley crew cab short bed dually.
This one didn't come out good because of the sun and I had a car right next to me haha.