Patio door lock not working

A quick learner says:
I have a very very old patio door in a condo that is not locking anymore and I cannot find a replacement for it attached are photos of the door lock. Can you help?
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Tom from SWISCO responded:

Hello! This handle set looks very similar to our 82-001. Look over the information we have on its store page and let me know if you had any questions.

A quick learner says:
I'm measuring 6 inches right below the top screw and right above the bottom screw. Can you advise if you think that one is still going to work or do you have smaller one around 6 in??
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A quick learner says:
Okay I just remembered this is the picture I'm not great at measuring and trying to take a picture all at once what does that look like 6 and a half inches to you? Do you still think the part number you provided in the First Response will work?
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Tom from SWISCO responded:

That does look somewhere in the realm of 6-1/2", but to be perfectly honest with you, it's not possible to get an accurate measurement with just a photo of a tape measure. Even the slightest angle could make it next to impossible to determine what a single measurement is. You would be better served measuring it as carefully as you can (without the camera) and using your best judgement. Make sure to only measure from the center of each hole, not their edges.

I can at least tell you that we don't have any lock in this style with a 6" hole spacing. I would definitely triple check.

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