Window crank internals completely shot

A handy person from Exton, PA says:
Great window just need to find matching crank and it is no longer supported by manufacturer.
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Bob from SWISCO responded:

Hello there. Some Simonton Windows have been known to use our 39-221 Dyad Operator, but I can by no means say this is what you need for sure. Please open the window to compare the split-arm shape and dimensions, and if it differs, please show me a picture of your operator's split-arm. I'll then try to find something better. 

SWISCO Window Operator Crank Handles
SWISCO Window Operator Crank Handles
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