I have recently ordered my Hartzel prop and I am using the showplanes cowl. My challenge is finding a 14 to 15 inch spinner and backplate to use. The standard 13inch doesnt match the cowl as well as I would like. Anyone have any secret spinner info they would like to share? I spoke with Bryan at showplanes and I have part number but Hartzel et al. wants 2,100 for new assembly thanks in advance.