Clip to hold crank leaver support bar
I'm afraid these clips aren't available by themselves. We sell a few different operators that have clips similar to these, but we can only supply the complete operator assembly.
If that interested you, please remove one of the operators in question from the window and show us a photo of it by itself and without obstruction. That would allow us to confirm a good match.
The bar with clip in your photo appears to be of the hinge. We don't have this exact hinge, since yours is an older discontinued model, but I believe you can use our 36-048 pair to replace it. You just need to make sure to use the pair to replace both the top and bottom hinge at the same time. The video below should clarify how this part works.