My daughter just bought a new Toyota Camry to replace her old Corolla and she got the heated seats and leather. Toyota won’t sell the heated option unless you get the leather for some reasons. The sales person did discuss putting the the leather and heated seats in an LE (they are only available as a factory option on the XLE and you have to get a bunch of other options as well). According to the salesperson, the leather option on the LE would be installed by a local upholstery shop approved by Toyota and it is $1600, same $ as factory option on new XLE plus $300 for the heaters, again same $ as factory option.
If you want heated buns from the factory, Toyota makes you pay dearly for it. The only option you do not have to buy is the V6, but you have to get everything else. Turns a $20k car into a $31k car just to get this $300 option.
I blame Subaru for all this, she test drove one of them where the seat warmers don’t require options to the max and the one she drove had the seat warmers. It was frigid that day, but the seat warmers were the only thing she liked about the Subie. It rode too rough for her.