I would like to add a center cap to my original 65 wheels. I've seen the smoothie (moon cap) centers. I think it is called the Smoothie Bare look? Where can I find the center to fit the originals?

This is what I have now....

http://2.bp.blogspot.com/-rBLs2qRj81M/TsBDhcDOA_I/AAAAAAAAAJ8/l6WMPoV2IJM/s1600/C10+016.JPG


Thank you
Tim