Searching for part no 122099

I'm not sure I understand the problem you describe, but it sounds like you need new operators. We can help. Before I recommend anything, I need you to disconnect the long straight arm from the track and show me a picture of the black slider that's at the end of it.

Perfect, thanks. I recommend our 39-253LB. This is an updated version of your original part. Since Truth changed the design, the handle and cover are also sold separately under the 39-451. Finally, you can  reuse the black slider at the end of the arm, but if that's not possible then you can use our 39-529.