One option is to use a PVC pipe that is longer, cut it half long ways before using it as a mold.
Prior to oven baking use a heat gun to make it easier to deform the PVC and pull out. It will also be a good starting process curing your orange
LGD
You guys are great. I did bake it. It did go on the pipe. It's not bad. I think I can sand and shape it more. It's really only limited by the person forming it. Test video coming up!