Actually, the one I ran across is for sale at Jim Carter's web site as a used part (garage sale item). I beleive it is a 57 to 59 and the price looks right. I've decided to hold off on mine for now since I have more pressing items to work than a turn signal. My left arm is still in realatively good condition for signaling! HA! But eventuallu I would like to have a more OEM style than the usual clamp on type....