Costa Rican Oxcart Replacement hubcap

So in Costa Rica they sell oxcarts as souvenirs. On our first trip there we bought a fairly large one. They have these decorative wooden hubcaps that hold the wheels on. One came off somehow and our special dog thought it was a chew toy. That was a few years ago, and we have been trying to find a replacement part since. We even went to the shop that makes them in Costa Rica and they would not sell us one. When I got a 3D printer I decided to make a replacement for it. This is the 3rd version tha