Hi Darryl.
That is an interesting item to be looking for these days.
I know they are not currently listed on the website of Fair Radio Sales in Lima, Ohio, USA, but it might be worth your direct emailing them and asking if they actually have any in stock. Their warehousing is huge and they do not list everything available on-line.
If these clamps are part of a kit of any kind, point that out to them, as they might be willing to part out a kit to sell you what you need if they have the kits and little demand for them.
Good luck with the search,
David
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