It's a pain trying to find the right cams. I wish the manufacturers had been more clear about which accessories go with which machines.
I'm about 80% sure I know which cams go with my Kenmore Model 84, but I'm going mainly on the shape and color of the box they come in, and that doesn't strike me as very reliable.
Also, for some reason the cams that I think are compatible seem to be really expensive on ebay when compared to cam sets for other machines.
I keep looking, but there's no way I'm spending $40 on some cams only to find out they are the wrong ones.
Then I look at the stitches that the cams can do, and wonder whether I really need them anyway.
I suppose I could relist them if they are wrong, but still.