from what I gathered, there are several styled of cams for the different manufactures of the Kenmore, however if you get similar style cams. Some are rather small, some are larger and flat, and a third style is larger with the top hat.
I just purchased a 158.18033 and will need to get the full accessories set for it - I'll have to go find that Yahoo group! Already belong to Singer, Viking, Pfaff (all vintage) and Bailey, so what is one more. I also don't like the Neo format.