[Rick TYler]

Using epoxy and fiberglass is a good idea. It turns out that another hobby of mine is building boats so I have a bunch of 6-ounce woven cloth and the appropriate epoxy, too. The hubs look and feel like a plastic that won't be epoxy friendly so we will probably have to attach the new "hub caps" with mechanical fasteners of some kind. Once they are drilled and slid over the shaft they won't go anywhere dangerous even if they come loose.

I see them painted in spiral patterns...