Ehhh. I’ll answer.
There are cheap kits on Amazon for about $75. The instructions suck, but if you have some deductive skills, you can figure it out just by looking at a few of the photos. I didn’t like the switches or wiring that came with my kit, so I bought a second switch harness that had some better switches and I changed the design. Rather than have two switches on the driver door and one on the passenger, I installed the driver side pair of switches next to my shifter. I changed the harness design as well not daisy chain three switches together. Each switch has a direct connection to the door motor and then they share a higher amp/gauge wire and fuse.
Instructions say you need 300mm between the motor and the drive gear. That’s more than you’ll have room for. So do your best installing the motor behind your pocket and it *should work.
My only problem is my window tracks are binding/causing my window to struggle going up/down on the driver side, but this was a problem even with the crank. I’ve been lubing the tracks with tri-flow but it only helps so much. So be sure that your windows freely go up and down or you might risk burning the motors out (mine get pretty hot).