Katzkin heated seats question

[Joe19TrailBoss]

Have a 2019 Custom Trail Boss I was considering adding Katzkin to does anyone know the part number or brand for the heated seat elements? Found the covers themselves on eBay but not the heaters. I’d want to add them as well when I have the seats out and open. 

[FiatDale]

You can add just about any aftermarket heat option. Trying to add a factory element and switches will end up costing way more than the katzkin.