If you're able to find stock replacement 1/4 window moldings, make sure you stop and get a lottery ticket on your way home! :lol:
Talk with one or several of your local glass installers, and they should be able to point you towards a 'universal' molding that, while not 100% correct, will certainly do the job.
Otherwise you're looking at converting to the '78-'80 style aluminum moldings...