Here's a new wheel that I just finished machining a center cap for this evening. They will be sent to the caster tomorrow and will be available in resin soon. One the right is a completely machined wheel including machined lug nuts and machined center cap and hub cover (when used as a rear). On the right is what I was going to use. Those are modified Italeri wheels. I added the acorn lug nuts and center cap as well as machining the outer lip back to bring the center of the wheel outward. For the rears, I machined a Italeri Pete wheel in half, added an outer ring with a tubeless hump and installed my little "top hat" in the center. The resin wheel is designed specifically to fit the Italeri tires only, but the aluminum wheel will fit Italeri as well as many after market tires.
I think the aluminum wheel turned out better so that's the one that will be copied into resin.