Greetings Kara,
We spoke on the phone this morning (7/24). Attached should be some photos of what I have for the channel balancer. I did find 2-3 pieces of plastic that I thought were the shoe, but maybe they are the top piece?
The window is a Milgard double-hung window that measures approximately 34" x 58" and is date stamped 1986. It has been loose in the frame since I purchased the home 4 years ago, and became much looser about 1 month ago. When I finally took it apart it only has one balancer, the other is missing. The one balancer left must have finally broken.
The balancer is stamped 2640. I tried to include a close-up of the plastic piece still attached (shoe?). I have photos of the broken pieces as well. There is a third rectangular piece of plastic that has a small stamp on it RCD035 - the back is stamped 45170-6 or 4S170-6. I don't even know if that is part of the window!
If you need different views/angles, or if there is any additional information that might be helpful, do let me know! It only wanted me to upload 5 photos, so I sent what it would let me. Thank you so much for your help,
Lea