Where are you located? I am giving away a 1960's Sunfish that is heavy but has all the aluminum rub rail. Take the boat and the rub rail is yours. Located in Rhode Island. Contact me at cjo1023 at yahoo-dot-com.
Scorpion railing will work. You'll have to reshape bow with a mallet and you'll end up with 2 small pieces left over. We salvaged a Scorpion and put trim on a Sunfish where someone had bolted the bow together. And several Sunfish parts dealers sell the rivets, Yankee Boating Center, Annapolis Performance Sailing or Laser Performance