I need a replacement handle with the cylinder and key

A home owner from Florida says:
I just purchase a home with sliding door that has the above post pictures but the key won't work. Would Inbe able to find a replacement please?
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Emily from SWISCO responded:

Hello there!

Thank you for reaching out to us. Depending on the installation hole center spacing, I recommend you look at our 82-055K (3-1/2") or 82-003 (3-15/16") along with the 82-306 keyed exterior pull that's sold separately. Review the specifications for these parts and compare them with your old hardware to see how they match up. 

A home owner from Florida says:
Thanks for your prompt response.
What I'm really interested in is the keyed exterior part of the sliding door since I would like to lock the door from outside,
Thank you!
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Emily from SWISCO responded:

Oh, I see! My apologies. In that case, see the 82-306. This can accommodate various installation hole center spacings. Take a look and let me know if you have any questions. 

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