I found this site online and know nothing about them but the price is good for the element.

Land Rover Parts - Land Rover Parts Center - Call (800) 574-9217 for Genuine Land Rover Parts and Accessories

I also have an S model with heated seats, the car came with the "cold weather package" including seat heaters, heated windshield, and heated side mirrors.

 

There was an issue with dash lights after adding the switches. Thankfully DiscoBeau was able to help figure it out in this thread.

https://landroverforums.com/forum/di...-lights-63607/