I've been looking into doing the same thing. I want to do all of the chrome badges (pony, GT, and faux gas cap) in black chrome or black nickel. So far I've only found one place that will do it. (I'll have to find the link to it). They recommend black nickel, because the black chrome finish wears easily. It was going to take several weeks to get it done, so I'm going to buy new replacement pieces to send in for finishing so that I don't have holes in my car. I'm sure that it won't be cheap either, but it will be worth it to me. It's something different, and the chrome bugs me too.