I believe the assembly P/N is 39-069 awning window lever operator, 20-1/2". Need to double check. Can you just replace the broken handle casting, or is the whole assembly needed?
Tom from SWISCO responded:
March 27, 2017
I agree, the 39-069 looks pretty close. As long as the "wing span" of the arms match up you should be okay. Unfortunately, the handle itself is not available by itself. You'll need a whole new operator.