[Mongoose930]

I am working on my headlight trim rings and have a question. Based on my research, the Cobras used a Lucas 54520651 or 554439 trim ring. I am looking to confirm this as I have 3 NOS versions of the 54520651 and they have a bit more taper to them then the reproduction rings I have seen. Also, my understanding is that the rivet on the original rings was nickel plated brass. I drilled out the rivet on these rings and it is clearly copper. These are NOS Lucas parts that came with boxes dated 1971 or earlier. They are chrome plated brass (magnet will not stick). I want to purchase new rivets but not sure whether to order brass or copper. Any information on original Lucas P/N's and rivet material would be greatly appreciated.

Thanks - Kevin