Pressure Shoe Pair

I am looking for some of these window pivots. The square base measures 1.25" and the post is 1.5" tall from the face of the base and 5/16" diameter. The bottoms side of the base is concaved. There are left and right hand pivots and I am looking for 20 of each. Please let me know if you can help. ... (cont.)

ISO a part for older windows from the 50's-60's. This is the top of the bottom in the track and glides a bit. Windows are push out.

I've attached some picture of what the existing hinge looks like. The building was probably built in the '60s. There's a plastic guide that is broken on a be side but I would assume the whole hinge would need to be replaced. On said guide there are some numbers that I'm just now seeing after I zoome ... (cont.)

Attached are two different brackets. The plastic bracket is from a tilt-out style window, metal frame. The metal bracket is from vinyl replacement windows that tilt in for cleaning. I have no numbers for either part. Please let me know if you carry either one of these brackets, or both. Thank y ... (cont.)

new to working on school windows and can not find an image to help identify parts like the plastic guide.