Looking to install a new black clip that holds the hardware stationary during operation

Attached are pictures of an Awning window that I am trying to repair. The window has a small black clip with (2) small posts missing. This clip holds the two operator arms centered on the window sash during operation. I am hoping someone might be able to help me source a couple of these clips. I apologies for not knowing what brand name the window is. It was installed many years ago.