Thanks for asking and sorry for not being as specific as I should have. I need the end black plastic piece that holds the threaded stud that connects the cargo rail to the bed rail. At the other end of the needed piece is a plastic stud that inserts into the bed rail and then the whole bar is turned 90 degrees so the threaded stud can screw into a sliding nut in the bed rail. The piece I'm looking for is separated from the bar by removing a single sheet metal screw. The plastic piece that goes into the bed rail is missing on the one that came with my vehicle.
Thanks now I know what you need and yes it is the entire end piece you are looking for. I can't help on that. If it was just the threaded slide nut I made my own for mine because they were missing. I used a piece of 1" aluminum stock and cut it down to the right size then drilled and tapped it. If that was what you needed I could make that for you. But your needs are bigger, sorry. Maybe someone else has a bar for parts. You might want to check with Mike of Simple Engineering.