keyrings

Wife is falling in love with casting resin. One of the items she is getting requests for are keyring fobs (the dangly part) made from resin. She is trying to decide the beat way to attach. Screwing with n an eyelet, even with a predrilled hole is proving difficult at the eyelet shank in not very...

I know, earrings are not pens and this is the penturning forum, but it's more akin to penturning than 'other things we make'! Does anyone know if there is such a kit available anywhere? Or would the best way be to use a couple of key-ring kits and replace the actual ring part with earring...