Heated and maybe power side view mirrors on 95 xj

Ok so I have a 95 country and it needs new mirrors. I live in Colorado and heated side views are a nice amenity. I have searched and not found a good right up. I wanna put heated mirrors out of a later model and preferably have them operate with the rear defrost switch, but a seperate switch would be fine as,well ,maybe pull a renix era trans button and use it for mirrors? All the mirrors I see with heated option have power aswell,so maybe any tips on making that work? Heated is much more of a priority now that its winter. Power is way down on the list.
Thanks

I would wire it into the defrost switch and have it trigger another relay to power the mirrors. I'm not sure how many amps they pull but I wouldn't think the defrost circuit would be able to handle the extra load.