I have a 1970 olds delta 88 custom 4 door hardtop and am missing the chrome molding piece that goes between the wheelwell trim and just behind the passenger side back door. The molding piece I am missing is about 5×5 inches..If anyone knows of where I can find this molding then it would be greatly appreciatted. Parts car etc..

 

A picture might help

 

Try the Oldsmobile page on https://www.vintagepartsource.com , several suppliers listed that have chrome trim, reproduction and used.

 

I dismantled a car like this a few years ago. Not sure if I have the piece still, but yes if you would post a picture of the one you have on the drivers side one of us might be able to match it.