Broken sliding glass door handle
I'm afraid we don't have an exact match for this handle. The reason for this, and the reason you probably couldn't find it anywhere, is because it's just too old. I don't think they've made this in a long time.
The good news is we have a solution that I think can work for you. Consider our 82-005 handle set. This is a specific "surface mount" type of handle set, meaning it just installs to the face of the door. It also has its own self-contained mortise lock, so it doesn't have to interact with any original internal hardware that can be prohibitively specific to older doors like this. That gives you a lot of freedom in how and where the 82-005 installs.
The only catch is that you'll have to drill new holes for it. When doing so, you have to be careful not to hit the glass. As long as you're aligned with the old holes you should be okay.
Let me know if you have any questions!