My Operator Worm Gear is Shot

A quick learner from Coral Gables Florida says:
Looking to replace my awning window (Jalousie Window) crank. I looked up the patent inside the part D-198,202 and is was originally registered to Amerock.

The worm gear is shot. I've included 3 pictures
One is the dimension looking from the window attacment perspective.
The other two are the operator itself.

Can you tell me what the exact replacement for this is?

Thank you.
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
How about our 39-084? Check it out and see what you think.
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