I dont think sportsters can be powered, the point of them is be supportive and cut weight. They arent fixed, so you can adjust them but its manual. They do offer a heated version, so no reason you couldn't wire them up to your existing switch.
you will also need to get a bracket adapter and a cheater for your airbags. sportsters wont come with air bags and if you want any of your cars airbags to work, you need to trick it into thinking the seat bag is still there