Yup...I looked into that as well and found the same info. In the end, I decided to repair them the way I did because I think it is much stronger than the stock pieces. I think the stock plastic easily breaks when people load stuff into the rear that it taller than the gate board. When they close the hatch, it hits the cargo, flexes the gate board upwards, and breaks the weak plastic tabs.In case anyone wants a factory-replacement, you CAN buy just the end pieces with the nubs from the dealer. Granted, 99% of DIY projects are cheaper, but once you factor in time, it's a close gamble. With that said, a 100% new piece is not far off from new ends if you need both.
65556AG04AJC Pass side $34.90 MSRP
65556AG05AJC Driver side $34.90 MSRP
65551AG03AJC Rear board $69.99 MSRP