'm afraid we don't have an exact match for this pivot bar. I haven't been able to find anything similar to it, either. It has a somewhat peculiar design. Could you tell me the distance between the center of each hole to the front tip that goes into the shoe? That would help us track down a possible substitute.
Perhaps I can be of assistance. Owens Corning no longer make windows, but sells the extrusions to other window manufacturers that add Owen Corning name to their product. Because of this, it makes it very hard to keep up with their replacement parts. Our 26-465 pivot pin screw holes match, but not sure you can install it with our nylon adapter, the 26-236 and 26-237?. You might have to modify the nylon adapters for this setup to work for your window.