Repairing Grille on 72 Duster

What is a good way of fixing missing pieces off the grill on my 72 Duster?Ive been wanting to get another one that is not broken,but everyone wants an arm and a leg these days for one and I decided maybe to try and fix mine.Also,what color of paint is on the grille?its silver on the middle.Is there a color that matches that exactly?