Is there a nice chrome Gas cap for A-bodies?
Here you go, Palmetto...
http://www.ebay.com/itm/NOS-MOPAR-1...Parts_Accessories&hash=item5895ad9b71&vxp=mtr
I had one of these on my first '69 Dart back when it was new. Looks a lot better than the factory painted one with the twist handle.
I found a NOS one several years ago when I bought my current '69 Dart project. As you can see, the NOS ones aren't inexpensive. But it's a nice clean look.