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Austin hardware would be a good place to look.

https://www.austinhardware.com/

Gordon,
Found some close but not quite long enough.  Thanks for the link, I have bookmarked it for future:-)

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When I put the picture into Google Lens, there are a number of grab handles from automobiles that pop up. Not saying I found one in the time I spent looking, but it might be a clue on looking in a different direction.

Thanks Richard,  I have found some car handles from late model cars but the are too small.  Perhaps I'll go to the early 80's vintage Ford products as Newell used stuff from that era.

Steve, I created a company account with Hansen. I will give them a call and see if they have any of those grab bars or maybe they can tell me who has been buying them.