So, inspected this MW window and is in need of balancers, pivot lock shoes, 1 tilt latch and possibly metal tilt pins, depending on your thoughts with the new shoe.
I believe the balancer is S900-29 and -26 for upper and lower spiral balancer 26" and 29" x 3/8" tube, but sash seems light and tips are not red. Maybe they were always wrong?! Tilt latch I saw is a rounded one and only need the left. Measures 2-3/8" long x 11/16" wide, not sure about thickness as I did not know you needed that.
Pivot lock shoes I think are 15-118, measurement of 1-3/8" wide x 2-3/8" high... markings on old are 590CSB, with missing blue cam. I am missing thickness measure. If this is the shoe, do I need to replace the pivot pins? They are in photos and not broken. I do not see this pin in your catalog and not sure if it will go into your new shoe. I'd upload more, but your system does not allow.
Sadly, may have been broken into and homeowner needs fixed ASAP. Let me know. I will get thickness measure for shoe and tilt latch tomorrow.