Key Lock for PPG Herculite K Sliding Patio Door

A quick learner from Maryland says:
I have a PPG Herculite K Sliding Patio Door that was installed in either 2007 or 2008. It has a regular two (2) lock mechanism; however, I need to replace it with a key lock mechanism. Can you tell me where i can obtain a key lock mechanism for this door? I am attaching pictures to help you identify the door and locking mechanism. If there is a dealer in the Silver Spring, MD, area I would appreciate knowing their name and location.

Thank you,
User submitted photos of patio door hardware.
Profile picture of Tom
Tom from SWISCO responded:
This looks a bit like our 82-074, which has a key lock. Could that work for you?

I am not familiar with your area, so I cannot recommend any local dealer, I'm afraid. Also, keep in mind that Herculite K is only the name of the company that made the glass, not the door or the door handle.
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