I found this micro sized keyer paddle at the Hendricks County Indiana Hamfest 2023. It is so tiny, but has an excellent feel. The paddle is also fully adjustable. The cost – $10. The ham who was selling these didn’t mind me posting about it, but he declined to be identified. He is not in the business of mass production of these paddles for commercial sale. The paddle is 3-D printed. I’m sure the details for such a paddle are on some well known 3-D printing sites. I plan to use it with my SW-3b and AT Sprint III backpack transceivers.
Update: After some investigation, this paddle is a design from Adam K6ARK. The 3-d printable files and and instructions can be found at: https://www.printables.com/model/332611-morse-code-paddle-cw-key