Driver's seat - update
My Nitro is an 07 SXT build date 03/15/07, part # for my application (driver side, slate grey, non power) is "1PL971DV-AA SHIELD 23-034-122", but the vehicle VIN # is required by the parts manager to reference. Price was $55.55 CDN + tax. As it seems I'm not alone here, I'll mention it, one more thing I did before install was to drill a small hole next to the front plastic lug. Once the panel (shield) was installed, I ran a #12x1" long sheet metal screw through into the fixing clip mounted in the side of the seat, with a black plactic cover to give extra strength and help prevent further recurrence. This was previously done as a temporary fix at both lugs so I know it works well and stiffens up the panel. This can be repeated the same on the passenger side to match and prevent that panel from being ripped off as well.