Spoke to guy from kitchen place. He provided part numbers. It is a plastic part which is butterscotch in color. I need the left part that holds that track. You can see that is broken at the bottom.
Tom from SWISCO responded:
June 22, 2018
Thanks for posting. Between the two of those products, I think our 32-025 is the better match. The style is a little different but I'm confident it will still work.