Argentium tarnish and Rhodium headpins

Hi everyone,

I make one off high-end pieces of jewelry using thousands of
headpins at a time. Sterling tarnished so bad I began using
Argentium pins about ten years ago. It was an improvement but, the
pins still tarnish. Does anyone know of a supplier of Rhodium plated
Sterling or Argentium pins? The tarnish produced by Argentium is
easy to clean using dish soap and a soft tooth brush but, for a lot
of my customers its just too much trouble. I now I provide a
cleaning service for them but, of course would like to find a

Any idease