Casement window lock

A home owner from Indiana says:
The crank hardware (39-107)for this window matches the Truth brand. I can't find a matching lock. I'd like it to be white. The screws are spaced 3 5/16" apart. Just forward of the primary handle pivot there is a stamped number on the metal: "31573".
User submitted photos of a window operator.
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Tom from SWISCO responded:
Unfortunately, your locking mechanism is no longer available. We have the 38-205, but it is different and may not work. Check it out and see if you could perhaps still get it to work on your window.
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