Screw mounted spacer inside window track

Hello, Rob. Thank you for your patience during this busy season.

We can definitely get you the hardware you need. This part isn't a stop, it's actually the top portion of a coil balance assembly. Balances are spring mechanisms that are what keep your window open when you raise it, so they're very important to how everything functions.

Before we go any further, I've shared a few videos at the end of this post. These are instructional videos of how to remove this kind of balance, but I think you should watch them just to get an idea of how these parts work and what kind of work is involved in this project. You don't have to remove anything yet, it's just to help us get on the same page.

After that, I'd like you to take a clear picture of the pivot shoe. This is a square plastic block-looking piece that's installed under the housing you're showing me here. It's the lower part of the balance assembly. Seeing that will help me figure out everything else you may need. If possible, I'd also like you to tell me how thick your coil springs are, if you're able. This may require you to remove them ahead of time but it is an important detail.

Here are the videos I mentioned: