Locking mechanism on 1960's aluminum window

A home owner from Burleson, Texas says:
I have some original 1960's aluminum windows in my home and am trying to find replacements for this pin that is used to lock the windows in a closed position. I have included a side shot and a top shot to show the spring that is around the pin. Several of the pins are broken and the windows can no longer be locked. Please help! Thanks !!
Window lock
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Dave Sr. from SWISCO responded:
We carry the 70-050 spring clip which looks similar to yours. Take a look and see if you can adapt it to your window.
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