Oh ya, they are out there. The problem is that M12X1.25 to 1/8"npt is to close to the same size. They even make those adapters too....but they make the hole smaller so it won't fit a standard temp sending unit, you have to get a specific sending unit with 1/8"npt thread but a smaller diameter sensor from the thread on down.
It's kind of on a back burner for now. Going back to learning how to work on the Dakar haha. I'll probably revisit it this summer and just drop the pan and be done with it.