I recognize this. I believe Jeld-Wen discontinued this particular balance system. Now, I think we can make up a substitute balance system, but I will need more information. Specifically, I will need a photo of the entire balance. I will also need to know the length of the metal channel and the width and thickness of the pivot shoe. Finally, I would like a photo of the pivot bar attached to the bottom of the sash, along with your measurements.
Thank you for all your help, Paul. I went ahead and ordered the whole assembly. Heck, it was less than twelve bucks! I can change the hook at the top and I think I'll be good to go!
Happy to help! let us know how this works out for you! Thank you for ordering with Swisco!