YEARS ago I replaced the seats in a Class C (not a Jayco). I went to the local junk yard and found 2 seats out of a high end Ford Van that had been rear ended and totaled. The seats were top of the line Ford with adjustable lumbar, heated seats, leather, practically brand new and in great shape - penny's on the dollar for new seats.
I added a switch under the seat and wired up the headed part.
Buddy Ray - Atlanta
Jayco 2016 Eagle HT 26.5RLS
Ford 2016 F150 Lariat, 3.5L V6 Ecoboost
Max Tow Pkg, 36gal tank
Reese Sidewinder and Reese Titan 16k hitch