Need keyed surface mount mortise lock and handle

A quick learner from St. Louis, MO says:
June 29, 2022

My (elderly) neighbor needs a new handle and lock, but I'm having a hard time finding a keyed surface mount mortise lock. Mounting holes are at 4 15/16". She needs a keyed lock so her helpers can get in when she is bedridden. 

I cannot at this time remove the lock for more pictures (but I could sometime if I HAVE to). The current lock doesn't always unlock when she flips the nub/knob and she's forced to use a butter knife to unlock her door.

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Emily from SWISCO responded:
July 1, 2022

Hello!

Your handle reminds me of our 82-005 with 4-15/16" hole center spacing which is compatible with the 82-306 keyed exterior pull. The keeper in your pictures is discontinued but our handle set comes with one. You would just need space to install it to the door jamb. Look these parts over and see what you think. 
Surface Mount Sliding Door Handle Assembly, 4-15/16"
Surface Mount Sliding Door Handle Assembly, 4-15/16"
82-005
$27.90
Keyed Exterior Sliding Door Pull
Keyed Exterior Sliding Door Pull
82-306
$29.70
Reversing the thumb lock on the Swisco 82-005 Sliding Door Handle
Reversing the thumb lock on the Swisco 82-005 Sliding Door Handle
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How to Replace a Surface Mount Handle Assembly
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How to maintain a sliding glass door
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How to install a key lock in the 82-306 Keyed Exterior Sliding Door Pull
How to install a key lock in the 82-306 Keyed Exterior Sliding Door Pull
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