DNS Industries, 16 inside pull Standard locking handle in sliding glass door.
A handy person from Las Vegas says:
April 6, 2016
Specifically, the sliding lock tab stamped "LOCKED".
Do you know of a replacement for this entire unit?
Paul from SWISCO responded:
April 7, 2016
DNS is no longer in business,but we have a lock that matches their #16. See our 82-002 and let me know if this is a good match. We also carry it with a keyed exterior handle, our 82-002K.