The standard trim on 70-71 Challeys is part of the headlight bezel therefore a complete exchange can be made along with the early grille, very expensive. Also the thick molding of the "Special" models can be fitted w/o changing the grille, a couple of members here have that, but again very expensive. There might be some kind of thin overlay that could be adapted, I've toyed with using aluminum tape but it is very soft.
Kind of surprised that you of all people would be looking to add bright work... I swing back & forth even thinking of blacking out my windshield & roof trim but probably won't.