you may be able to find a trashed newer boat to recover a self tacker from, ask around.
My 5.2 was a 1976, forgot the sail number, but it now sails from my club newly refurbished(again) with a Sq top. Boat is heavy but well built. I redid the bottoms twice and they have been again now, but other than that its a tank. original mast, daggers, and rudders, I traded for the boat in 1990 after sailing a G-Cat 5.0. traded my laser 2 for it straight up, been a catsailor ever since.