Need 1974 20 original rub rail

[Oldboat]

My brother and law are doing are builds togeather at the same times. After comparing my 23 rubrail to his he has an idenical rubrail as I got from integrity marine but smaller for his gunnel cap to hull area is shorter. Any one know were to get the original for 20.i posed the one I got and his older one from his 20 is about a 1/4 inch smaller than mine in all dementions