I got two sets of these for two different Fits. Looking on Amazon, the price has been as high as $70, so I thought I should get them while they're at an all-time low of $40.78. Of course, it's too cold to install them now, so I'll have to wait until the weather is warm, and I don't need them.

https://smile.amazon.com/Dorman-628-...r+seat+heaters

 

Awesome. Hopefully you can document the install process for other members.