You know, this sort of thing: I did a search and, surprisingly, there does not appear to be a thread devoted to this late-'50s/early-'60s custom element. Let's see some examples (especially ones in unexpected places: rear grilles, vent scoops, etc.) How about it?
There was a car on the Desert Car Kings show a couple of weeks ago with a grille like this. It was one of their customers cars but cant remember what. This is a slick once affordable way to make a custom grille. Now I'll be on the lookout for a box of knobs at the next auction or yard sale I go to.
Here's some more.. http://www.jalopyjournal.com/forum/showthread.php?t=397578&highlight=chrome+knob+grille