I beleive you are correct the bright dip anodized process only changes a few molecule thickness of the aluminium. But I am having the entire car repainted and I could not see myself putting the old UGLY trim back on the car. I have done only a small amount of searching for new ones, but have not found them for sale.

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Stable:
1973 450sl
1978 red diamond ice vette
1975 steel blue convertable vette
2002 steel blue dakota quad.