Sliding patio door plastic lock

A handy person from Fort Walton Beach Florida says:
I am having a hard time finding these locks for patio doors. If anyone can help me I would greatly appreciate it.
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Dave Sr. from SWISCO responded:

I don't believe your patio handle is still available. See if you can use our 82-100 thumb latch to replace your plastic one. If not, you will need to replace the complete handle set with a newer version. We can help with that but we will need some complete photos of the handle. We will also need you to measure it and tell me what you get, especially the hole center spacing.

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