Curt: I think it goes without saying this whole thing was way more involved than either of us expected, and to be frank I don’t want to spend any more time trying to figure all this out.

Black or White - Guardian Style Patio Door Set | 11" Length Wood Handle - AS SHOWN IN PICTURES. 

The Oldach Sliding Glass Patio Door Mortise Lock Assembly Parts - Mortise Lock Assembly with Hole to Hole Centers as shown. For some Wood or Aluminum Clad Patio Doors. This is the # OLD-PD-M3R1, Sliding Patio Door Mortise Lock SEE PICTURES AND CONFIRM YOUR MEASUREMENTS AS SHOWN BEFORE ORDERING. Anti-Lift Protection, this patio door mortise lock is constructed from steel. It features a keeper that integrates into the lock body for positive anti lifting protection and a steel shank hook. 

Patio Door Handle Set Key Lock | Keyway and Keys | Door Lock / Key Lock / Keyway Tumbler for adding the "key locking" feature and function to most patio door handle sets. The keyway is shown from the outside.  NOTE: The "tail shaft" is extra-long and can be cut for adapting and field fitment to fit any door thickness.  Comes with two keys, as shown.