I changed my mind on the trailer. I'm saving the fresh kit that started this build for another truck. When I built the suspension, I mounted the axles below the springs instead of on top of the springs per the kit instructions. I realized my mistake and then the idea hit me. I had some 15 inch trailer wheels and tires made by Mo'Luminum, so, I modified the body of an ebay built-up I bought years ago. First, I completely cut out the trailer's wheel wells. The upside-down axles help to make up for the change in ride-height resulting from the change of wheels.
Scrap sheets of plastic were placed over the holes in the floor left by the wheel wells.
A paper template of the wheel arches on the side walls was drawn, and filler pieces were made from 2 broken side walls that I had in my spares box.
I cut the filler pieces to shape and ground the back sides thinner so they would cover the wheel arches.
Here is my filler piece installed.
Here it is mocked up with its new wheels
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