replace patio doors hardware

A home owner from Los Angeles says:
This is post 1 of 2. The 2nd post will have 5 more photos. I want to buy replacement parts: (1) handle with latch, both exterior and interior pieces (2) screen door latch mechanism, both interior and exterior parts (3) post that screen door attaches to. I cannot find any makers' hallmarks on any parts--they probably date to 1975. Thank you!
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A home owner from Los Angeles says:
here are the rest of the photos showing the existing hardware I woulld like to replace. Thank you!
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Emily from SWISCO responded:

Hello!

Thank you for reaching out to us. Our 82-030 handle set has a similar clamp and measures 3" on the installation hole centers. Look over the specifications for this part and see what you think. 

I'm afraid we don't have a match for the screen door keeper but we might be able to help with the handle. I can narrow down some options if you can write out the distance between the two installation holes, measured from center to center. 

A home owner from Los Angeles says:
Thank you, I ordered the clamp handle set. Here is a revised photo of the screen door handle I need; the distance between the two installation holes is exactly 3 inches center to center.
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Emily from SWISCO responded:

Thanks for getting back to me! I've related a handful of screen door latches on this page for you to review. They measure 3" on the installation hole centers but take a look at the rest of the specifications and see how they compare with yours.

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