Seat belt warning light cable and plastic clips in seat base sliders

I am renovating the interior of my '72 911T and pulling the seats apart. The passenger seat sliders / runners are missing 2 of the plastic clips that make the seat run on the base brackets. I cannot locate these anywhere.

I also need the passenger side seat belt warning light cable.

Finally, there should be some metal stops in the center of the runners to prevent the seat sliding off the runners forwards or backwards. My passenger seat is missing these.

A quick search of Pelican, eBay, Stoddards and SMC failed to turn them up. Does anyone have the part number or suppliers for these parts?