Window crank replacement

A contractor from Virginia, USA says:
This is a truth crank number 45251
I haven't been able to find this part number anywhere and am look for a comparable replacement.

Thank you!
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Emily from SWISCO responded:

Thank you for reaching out to us! Your operator looks like an older version of our 39-171 but I recommend you compare the dimensions with yours just to make sure this matches up.

Dimensions for 39-171
Dimensions for 39-171

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