Mcmaster has material for making a shaft if you don't have any luck.
Use the 1055 steel. Stainless bends too easy in this application.
pn 6112K37
You can also use Sleeve retaining compound to hold it on the shaft. You can find at the autoparts store in the section where the locktite is.
Jeff
The Warnings & Cautions discussed in this manual cant cover all possible conditions/situations. It must be understood that common sense and caution are factors which cant be built into this product.