barracuda grille

On the grille for my 68 barracuda the studs holding the trim on it are spinning when I try to take to nuts off. The studs and nuts are very rusty, I have tried to hold the stud with vise grips and turn the nut with a wrench and this resulted in the stud breaking, several were already broken. The chrome is not in good shape, where can I find a new trip piece, I looked on year one and they dont carry one for my car. Can anyone help?

Evan

Whats wrong with the chrome, are they broken or just dented up?
Those are anodized aluminum aren't they?