Hmm, I don't know of any aftermarket. I plan to be in a wrecking yard in a few weeks, and I know he has 2 22 GP's but I can't recall if either has a vinyl top or two tone paint for that moulding.
Maybe someone on here has a parts car with it on there.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)