Well if you are determined you could try the oft reccommended cut out discs of sand paper or screen wire and slip em in here and there and that may even work for an extra flight or so But you will soon be back here Wanting to know why your cheezy cheap plastic back plate is slipping pretty soon. And be careful those can damage and smooth the knurling on your thrust washer compounding the problem every time they do slip.

This is a serious big engine with major torsional thumping in the plane of rotation as are a number of others big singles. Using cheezy entry level beginner type accessories can only go one way.

You are wrong about not being able to get most any style in a serious accessory. The differance is its going to cost and typically for that engine in about those sizes it will be about fifty bucks.

Go to this page and start here:

http://www.truturn.com/af.htm

You will be selecting Engine make and size - propellor make and size - Diameter and length and cone style amoung a wide variety. If you have trouble then call them they will walk you through everthing and even try various spinners on many give engines and props right there on the phone.