Need a new lock because I can't get keys made

A home owner from Texas says:
I think I just need to lock, not the handle - the screws that attach the handle are 4" apart.
Please let me know what part would work or if you need more info.
Thanks!
User submitted photos of patio door hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for choosing SWISCO.com. I believe you should be able to replace the key cylinder in your handle with the 82-310. Take a look at the part and related videos I've posted and see if it will work for you.
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