I do not know.
Question is, why is it considered non-repairable?
It any event I would start by removing the outer bearing(a bearing puller should work).
That will allow closer eyeballing of the spacer. I doubt it is permanently attached.
Assuming it is removable, drive the inner bearing off(with/without the spacer).
What have you to lose at this point? At least the outer bearing could be replaced.
Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E(SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange