gibson vintage nickel machine heads

Gibson Vintage Machine Heads?
I have a Les Paul '79, and one of the buttons on the machine head has come loose. I want to replace of all, but I can not find a replacement that is nickel, nickel vintage with buttons. It seems that everything now is perloïde. Does anyone know where I can find? I live in Tampa, but I guess I'll have to find this line a few hands. Otherwise, anyone know a good link to get this thing stuck again. This is my E string grave, so there is a good deal of tension when it gets …
Have you tried Ebay? Now I have a set of 1975 heads paul machines that could sell. This is a series of six.