Actually, revisiting and looking at toot on Aliexpress, this may work. At the price, its def worth a gamble...
https://www.aliexpress.com/item/Dou..._1&btsid=44129edb-fc89-4700-8418-4d94acc0b4fa
So it turned out that I had one of these things.
It actually works for the handle. The threads are wrong but they catch into the handle that the King Cobra comes with and the Jurgen Hempel handle.
It's ugly though. The DE threaded end is rough. I had to put a stainless steel head on it and take it off a few times to knock the burs out of the threads. It's a POS honestly. The DE side is threaded crooked on the one I have.
I had bought it a year or two ago because my wife's uncle carves nick knacks and I was going to give it to him and see if he'd whip up a nice handle for me. Thing was so crappy when it came in from eBay that I tossed it in the back of a drawer.
It actually looks pretty decent on the Jurgen Hempel handle. It works for using the King Cobra handles with other heads.
I still want to find an adapter for the head to work with regular handles gentlemen. Keep your eyes peeled.
I think it could work with a bit of threaded rod. It would be so Jerry rigged that I could hardly see the point in bothering to try it.