I believe the original was chromed cast metal. Any help as to where I might locate one would be greatly appreciated! Reference photos of what I believe it looked like is shown in the pictures below.
I have a whole mast and base... I'm not really wanting to part it out, but it's in good shape and the metal is in a condition that should allow it to be chromed without worry. Here's a link to the listing I have on FB...
More than happy to talk to you about it.
Chris