The ones that I duplicated are slightly different, in that they are about a half inch longer than the original ones to better fit the space that the occupy.
Maybe if I sand down the round part, they might look more like the original ones.
After sixty years, weatherstripping shrinks down (and cracks, becomes brittle), so you are probably closer to original size than you realize.
Without a pic of where they go, I'll take a wild stab at it and say they're called radiator yoke seals.
