I've got the seats out of my STS while I'm replacing the HVAC blend door motors and while they are out I'm going to replace the foam in them and would like to fix the lumbar. All I can find is the lumbar supports for vented seats. I have heated/non ventilated seats. Anyone know the P/N for both left and right? BTW for anyone interested the seat bottom/back pads are very reasonably priced on gmpartsdirect. My drivers bottom had collapsed.