Been looking at Wheelsmith caps, the '49 chev one looks alright;
http://thewheelsmith.net/wheel-acces...ie-accessories
They are marketed for smoothie wheels but have to find out if they'll fit 16" wheel vintiques.
FYI - steer clear of 16" wheels as there doesn't seem to be much available in terms of tires, caps, etc. I'm sure alot of you likely know that anyway. My own mistake, should have done more research and possible just went with 15" as there seems to be much more available.