need a crank parts to replace existing caradco crank

A contractor from Manchester, NH says:
need a crank replacement parts. see attached pics
User submitted photos of a window operator.
Profile picture of Paul
Paul from SWISCO responded:
Hello! Please start with our 39-156 operator. Just make sure that the dimensions match up, especially the size of the arms. If you also need a cover and handle, see our 39-107 and 39-114L, respectively.
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