I think this is those heaters:
Universal Carbon Fiber Dual Temp Seat Heater Kit
If it is, then $90 isn't a bad price.
Those are exactly the ones I ordered, and there are much cheaper ones available. The benefit to these are that they are made of a mesh or a web of carbon fiber (look at the picture of the bottom of the pad) which can be cut to length and not affect the operation. This is absolutely necessary for 2nd gen trucks.
As for the switches, they look good, but if anyone else tries this location, they need to be moved back as much as possible (away from the shifter 1/8" - 1/4"). I tried to center the switches, for visual appropriateness, but I wound up without enough clearance and had to bend all of the wire terminals.
I also got to try them out for a couple of hours last night and they get hot quick. I had to put it on low after about 15 minutes and it still felt hot. I was really disappointed after seeing how much had to be cut off during the install, but have no fear, they toasted my Levis with plenty of heat.
I don't know if I'll have time really soon for a detailed write up, but if anyone wants any information, please don't hesitate to let me know and we'll set up a time to talk. There are a few things to know before hand that will help make it easier.
The stitch detail running through the center of the seat is held down with a wire imbedded in the seat foam and a plastic tube in the upholstery and held down with hog rings. This is why the pads need to be cut in length. They can't be cut width wise, but we have just enough room for them to fit.