Locking mechanism for sliding door

Hello there! Thanks for reaching out to us. I'm afraid the sticker shown here doesn't help us identify your hardware. Can you show us photos of the lock in question? We'd also like to see a photo of the handle set.

Thank you for the additional photos! The mortise lock cut out reminds me of the 82-218 and 82-223. The 82-218 has a round face while the 82-223 has a square face but it's hard to say which one may fit due to the damage. 

For a new handle set, see the 82-030B and 82-030A depending on the position of the thumb lever. Review the specifications for these parts and see how they compare with yours. 

In most vinyl patio doors there is a steel metal stiffener sleeve inside to keep the door straight and to add strength to the vinyl door. What could have happened was when you removed your existing hardware, the steel stiffener could have dropped a little inside the door stile. You would need to raise up the stiffener to align with the cutouts and holes in the patio door to match the parts to be installed. You're also welcome to upload a photo of the original mortise lock in question for us to review. 

Have a look at the 82-223 mortise lock with the "square face". I'm afraid I can't be sure since the lock fell in the door and the cut-out is a bit mangled. However, I believe it is worth considering at least. Our return policy can be found here just in case. 

Alternate image for 82-223