Stereo head unit would be the easy part. Here is a brief, but not complete, list of components that would need to be changed: A/C compressor, all refrigerant piping, condenser coil (in front of radiator), entire HVAC duct assemb!y in/under dash (has two refrigerant coi!s a!ong with resistance heater instead of one), associated control modules, and wiring harnesses.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019