I actually found the book. These are the part numbers for the cams.
26845 Cam #5
26848 Cam #8
26849 Cam #9
26850 Cam #10
26852 Cam #12
26864 Cam #24
28772 Cam #30
28771 Cam #31
28766 Cam #36
40425 Cam #50
These were the only cams mentioned in the book. Does that mean these are the only ones that this machine can use? Or can it use others? The one that came in the machine is #20 and it seems to be the main one for the basic stitches. It is black metal. I have seen ones on ebay that are grey plastic but have these same numbers and usually come in a set with others that are not listed in my book.