Broken arm crank on a republic window

A home owner from Milwaukee, WI says:
We need to replace a broken arm crack on the left side of a 3 bay window. The windows are Republic and the original installer said they went out of business and the installer can no longer get any parts.
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Tom from SWISCO responded:

Hello! Your operator here appears to be a match for our 39-187. Please look it over and let me know if you had any other questions, I'd be happy to assist in any way I can.

Dimensions for 39-187
Dimensions for 39-187
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