Depends on what you want and can afford. If you like Aluminum Tru-Turn is considered the best by many. Dave Brown has a good product as well in the size range your looking for. You can call up ether manufacturer and they will custom cut the spinner of your choose for the prop and engine that you intend to use it on.
Most of the plastic ones are good as well. But they don't hold up well to abuse from an electric starter. The choose is yours. Good luck and have fun !!! [&:]