Before you go further.....measure the ID of your strut barrell. Not the strut bushing...the barrell itself.
If it is 1 3/8" then all you need is a different strut bushing for 1 1/8 prop shaft.
If the strut is 1 1/4" ID....then you need to have a new strut made.
Same deal with the whip strut if you run one.
Sangers came both ways.
A used prop shaft you do not want. You don't know the quality or what it has been through. You want a new Aquamet 22 prop shaft.
Tom Bently has that stuff. You also want the new killer key stock. He has that stuff too.