sliding glass door lock

A handy person from Austin, TX says:
DNS stamped on side of lock.

This is an internal lock, in other words it does not have a key.

The locking mechanism is worn out.

Need replacement part.
User submitted photos of a mortise lock.
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Tom from SWISCO responded:
Thank you for reaching out to us. Please take a look at our 82-226 mortise lock and let us know if this could work for you.
How to maintain a sliding glass door
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