After over three years of searching, I finally found this aluminum trim. I saw a picture of it in use in the Winnick designed 75th Anniversary Edition so I called the factory. The young lady that answered the phone in parts was stymied so she went and asked another parts person. He had no idea what I was talking about either. I asked her to look up the online picture I was looking at so she knew what I was referring to. She said she'd get back to me once she found it. It took her a couple of days to locate it and she returned my call. Said I'd need to order a minimum of 12 feet and that I'd have to place my order through a dealer. I called Rick at Oasis in Tucson and explained my story to him along with the part number. Rick called me back a few days later and said my order was being sent out from their shop in Tucson that very afternoon.
It is part number 115345 and the factory has to special order it from a manufacturer as it was only used on a prototype. It runs $2.95 per foot plus shipping with a minimum order of 12 feet. It was exactly what I was looking for. My era of vintage used something very similar but all I could ever find, when I could locate some from a parts trailer, was full of holes and scratched up. This trim provides a nice finished look with an authentic period correct feel.
Still have the bathroom to do, maybe next weekend if it's not over 110 degrees.
Brad
FF