Kinnear sliding screen door

A handy person from Honolulu Hawaii says:
The photo is of the button latch with a spring retractable post. It mounts to the adjacent stationary door panel. The retractable post extends into a hole in the bottom of the rolling panel. It serves as a retraint when the post button stem is released, preventing the rolling panel from moving as a pass by.
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Tom from SWISCO responded:

Thank you for your patience in this matter. We don't currently have this part, but we just located something that we think may be a good option. Please give us a little time as we have it made up and I'll let you know as soon as it becomes available.

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Tom from SWISCO responded:

Please see our new 80-062 , I think you'll find this is a good match.

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