I actually painted them m'self! I don't know how to make resin eyes just yet, so I used small glass accents (sometimes called 'unicorn tears' or 'dragon tears') that get sold at JoAnn Fabrics or Hobby Lobby type places, and put into fish tanks and flower vases by interior decorators
I painted the flat side of the glass with glass enamel (also sold at JoAnn) and voila!