Need help with my windows

We have been able to identify a variety of your hardware. Please visit our 26-089P til latch pair, 26-041 pivot bar, and 15-015 pivot shoe. Let us know if these could work as substitutes for your existing parts. Taking a closer look at your balance, I believe the tube is 3/8" tube diameter. Please confirm the measurement. If so, then our Series 900 spiral balance would be the replacement. We would just need to have you let us know the tube length. 

Hey, Ed. That piece sounds like a sash stop. We don't carry a sash stop for this window, but you only need one per window. Sometimes they're built with two. If that's the case, you could always poach one from another window.

We do have a video on how to replace this kind of balance, which you can see below.