Motor magnet adapter for vintage shinwa motor dresser / dyno

[catman79]

Hi all, I am looking for a replacement motor magnet adapter, the small magnet part which attached to the Motor for my vintage shinwa motor dresser / dyno,
Only pic I could find on the net was this one.
https://share.icloud.com/photos/0HNpdLNS84WLWqq4OCsl6aqXQ
Please pm me if you have one