Here's another thought as well. Tru-Turn Spinners will drill and/or cut, or have the exact size spinner you want to fit your motor/plane. You can just tell them the prop you're using, and they'll cut/notch it for the prop. Nice thing is, if the notch is large, you can use many types of props. You can even get an anodized color as well. Just tell them what your application is, and what you're looking for. These aren't cheap, and there are of course alternatives... but these are good spinners. Good luck with it.
https://www.truturn.com/