Searching for SGCC 1922 sliding glass door handles

Thanks for posting! There is a chance that we can supply you with a replacement for the handle set you have here. Although, to determine this, I'll need to see a photo of the compatible internal mortise lock as well. 

It may also be able good idea to see the innerworkings of the handle set to see how it interacts with the mortise lock.

Please let me know if you have any questions in the meantime.

Thanks for the photos. I'm sorry to say that we do not carry a replacement for the type of handle set you have here. You may have better luck contacting the door manufacturer or a supplier that may carry their parts.

I do apologize that we cannot assist with this repair but please feel free to reach out with any other hardware repair projects you may have.