Eat more chili.....OR
Make it yourself, it's easy. You can purchase heating elements from many electronics supply places (same ones Corbin or other companies use) or you can get a used one from ebay from a car with heated seat.
Drill through the rivets from your corbin, pull up the leather, put some spray adhesive on the foam, lay the heating element where you like, run the wire wherever you like, through the center of the seat is best. Recover the seat and rerivet it.
Make a quick connect a few inches away from the seat. Wire it up. Voila, done, for $10-$20
If you cannot find the heating elements I speak of you can buy the cheap heated hand grip elements. 4 is about right but two works as well.
I used those a few times as well.
For myself I never found the need.
