I figured as much.
So does anyone make something that is 9mm, relatively small, sa/da with a decocking lever, that does not have an external hammer? I haven't seen one with my limited searching.
The Taurus 709 Slim has an external safety. I carry one in the chamber with the safety on. I must release the safety before firing. If it fails to fire, I pull the trigger again. It is a combined SA/DA. It has no hammer. I think it would meet your needs. I know the weapon has some bad PR. I had trouble with it when I bought it used from and INGOer. I contacted Taurus customer service. They had me send it back. They fixed and covered all the costs. Works perfectly with many types of ammo.
Try it.