A wanted ad here. You probably don't need the whole set or even the whole rod. The end just screws off it looks like. Yep, a wanted thread. I bet someone has some lying around.
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After looking at that brass piece from eBay, I thought i can make something like that with some old tubing which I had but the ID was too small for the rod. There was however the spring clips that separate which was transmission cooling line which would fit.
After about 15 minutes shop time with a drill and Dremel...