Here's where you can buy the bushings only to center the back plate

http://www.truturn.com/cgi-bin/store...aparts&maxp=30

Here is where you can buy the proper bushing and nut to go with your engine

http://www.truturn.com/cgi-bin/store...2a&ppinc=adapt

Engine thrust washer that came with your engine, spinner back plate, prop, prop washer that came with your engine, Tru-Turn nut.

Spinner is held to the nut with a screw