.. I'm sure there's a way it could be done, the issue is going to be finding a shop that knows how to do it. Dealer technicians know how to replace parts and diagnose problems, but modifying systems is generally beyond what they are trained to do. I think the aftermarket kit you agreed to is probably your best option.
I believe this is exactly correct. If you can determine the proper "sales codes" (which is what FCA calls their option codes) and can find a dealer willing and able to add them and reprogram the modules then (with all of the appropriate OEM hardware in place) there is no reason it shouldn't work. I've done this in the past with other (non-FCA) vehicles, but you need to understand every piece that makes up the factory system and which modules care whether or not the seat heaters are there.
While I wouldn't like a drilled hole with a button either, I agree that it is by far the easiest option.
- 2017 Pacifica Touring-L Plus - Jazz Blue, Advanced SafetyTec, Uconnect 8.4N, KeySense
- Ordered 5/31/16, Current status: KZL as of 6/28/16, Arrived at dealer 7/6/16, Purchased 7/11/16