I just spoke with one of our older window experts here and he does recognize your pivot bar. It is the old style version of the 26-129 but unfortunately the 26-129 is not a replacement for the old style bar. He said that he has had customers confirm that they were able to modify the 26-129 bar to work but that he does not have any specific instructions on what would need to be done to get it to work. The old style that you have is definitely discontinued and is no longer available.
ok, thanks.
I'll order a few of those and modify.
AlaN