'66SevenLitre:That weather seal has never been reproduced. You'll probably have to make one unless you can come up with a similar one from another model.
I looked at tons of them for Fairlanes, Galaxies, Ford vans, trucks etc and could not find a close enough match that either I could make work or modify.
If you do find one, even if it's for another make (i.e. Mercury, Pontiac, etc) please share with the community!