Hi Don,
Why not just make one? Don't remember what the one I had looked like,but you can super glue a pin to the Plastic Strike Ring,or drill a hole in the Plastic ring, if you want it to fit tighter,then just super gluing to outside of it. Can make it out of a wooden dowel,& paint it Silver,or take and old clear Ball point pen cut out a piece as needed. Just make sure that you match the size of the Pin to the other piece to be attached to...
John