Thanks for you post! I'm sorry to say the pivot bar you have here has been discontinued and is no longer available. Our best replacement suggestion is the 26-150 Pivot Bar.
To install this, it would require drilling new installation holes into the side of the frame, white would take a bit of work. You'll need to consider the shape of the frame and if the pivot bar will install properly. Also, you'll want to be sure the pivot bars are sitting level with one another. That said, take a look and see if this could work for your repairs.
We do have to advise exercising caution when drilling the holes since there is a potential to crack the glass or damaged the frame.
Your particular shoe is the 15-233 Blue Locking Terminal, which is typically installed on the Series 751 Channel Balance. Although, there are some instances where we may need to install the locking terminal to a plain channel balance.
That being said, the 26-150 cam pivots are the pivot bars compatible with all of our knife lock shoes and locking terminals.
Unfortunately, there aren't any other balance configurations that could be installed in place of the system you have in place now.
Please let me know if you have any other questions.