Stator / rotor interchangeability

My suggestion is figure out what is needed, then look for parts.
I think its best if the rotor and stator are appropriately matched.
Carefully open them up and measure for continuity in the rotor and in the stator windings.
Note any color markings on the windings or winding insulation as well as the stamped part numbers.
You may have enough good parts to make one or two good units out of what you have.

I thought both of my my pre-70 roundbacks had bad diodes, turned out to be the rotor.
A break in the stator at the junction of the three windings can be fixed.
Rotor windings are something I'd find a place that rewinds, or another rotor.

If it turns out you need to press diodes, send me an email.