Good find, probably the closest I've seen so far, but:
1) the tip looks flattened on either side, whereas the actual beacon is round.
2) The shaft of the beacon is tapered in the middle, like an hourglass, whereas the curler shaft is straight.
3) The beacon has 4 columns of 4 slits equally spaced around the round beacon top, whereas the curler has 2 columns of 5 or 6 slits on each opposite sides.
Picture 55 on the ref CD shows it clearly.
It would fool most people at a con, or wherever, but as a found part, that specific one is not it, IMO.
Having said that it's a good find, and might be the beginning of a trail that leads to a found part. I have no idea about late 70's hair styling devices, but it's conceivable that what you have found, Bobo, is the modern day equivalent of the vintage part used. Keep looking, see where it takes you.
Good work. It's only by this sort of research that we'll find all the bits used.