Need samples, at least 2 different for 1967, 1968, and 1969. I am pretty sure that there are diagrams for the stripe color. Need ID, OD, and all lengths. If they are joined or not, stripe dimensions, etc.
I have a guy that reproduces my Cougar headlight vacuum hoses. He is more than willing, although I wish that he would improve his stripe adhesion to the rubber.
Tim and Coral Snake may have a 1968 in the works?