Sliding glass door latch is missing to lock the patio door
Can you show me a picture of the handle set and lock in question? From there I'll do my best to narrow this down. Thanks.
Thanks for getting back to me. I'm afraid I don't believe this handle set is not made anymore. See our 82-005 Surface Mount Handle set instead. Look it over and see if you could adapt this to your door.
Bob's not here today, but I will do my best to help.
Looking at your photos, I agree that we don't have anything that matches this exactly. The 82-005 is a good replacement option because it doesn't interact with any internal lock in the door. That's because it comes with its own built-in mortise.
As for drilling new holes, I don't know if that will be necessary for you or not since you didn't mention what the hole spacing for your old handle was. I can tell you that nine times out of ten you will need to drill new holes for the 82-005 handle set.