Hi Pete
I think the mechanics for this would have to be genuine pattern parts with relays, switches,looms and the like,But if Kia dont do these parts then i would say they dont exsist. Perhaps If you really want this feature you would have to obtain electrically operated folding mirrors from a scrapper of another make and graft them to the doors.Not practical though, so would say your options are pretty much nil,
With out sounding perdantic why didnt you buy a vehicle with this feature?
all the best on your quest
seasonal best wishes
col