Seat heating rear bench

Hall oils, I am thinking of retrofitting the rear seat heating. Have leather equipment, at the back without the popo heater. I know that the heating is always sewn with leather. Can you take the heating mats from normal equipment (sports fabric seats) and “sew” or build under them? Or are there leather mats with a different heating performance? Would you like to avoid the investment for new leather covers at FOH. Is it technically feasible? The thermostat is integrated into the mats or am I there on the wooden way? Greeting Lars PS: Cable trees, switches, relays etc. are already installed.