The piece on the left looks like a top sash guide, but I'm not certain about the piece on the right. Starting with the top sash guide, I'd like for you to show me a picture of it from the front, if possible. For the other part, can you show me what this looks like while it's installed?
Thanks again for waiting. Your top sash guide looks like a match for our 18-169. I'm very confident this is what you want. The other piece looks to be a shim of some kind. I believe it's supposed to add depth to the bottom balance shoe. Unfortunately, we don't have a replacement for this part. They usually don't wear down, since they're not exposed to any direct friction. Could you reuse it?
Great! Glad to hear it. Thank you very much for your business, it means a lot.