New here, but decided I would include the pictures of my power mirrors. I have a D&R kit and the mirrors are a two piece like OE so they can flex if bumped. I wasnt real sure what I was doing, so this may not be the best solution, but figured I'd share anyway. I started by going to the junkyard and finding a late model car with low mileage that had power mirrors and to be honest I dont remember model but it was a Buick. Then off to the hardware store for some "L" brackets and HD springs, bolts and fiberglass resin & hair.
I glassed in the "L" brackets in one side and a metal rod on the car side. basically attached by the spring.
Then I glassed in the rear of the Buick mirror mounting locations into the kit mirror.
Then just mount the power motor to the factory mounting locations glassed into my mirror. Then I just need to add the mirrors (havent done that yet)