Replacement cranks for older louver windows

A home owner from Ventura CA says:
I have some older louver windows which are starting to fail (they no longer close tight and air, dirt and bugs get in). I am attempting to locate replacement parts for repair. I have additional; photos but the upload limit is 5.

User submitted photos of a window operator.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting, Ed. I think this looks a lot like our 39-056. Give it a look and let me know if you agree.
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