Louver/Jalouise/Awning window crank

A home owner from Stow, MA says:
Looking for a replacement of this part for louver windows for an enclosed porch. Two hexagonal rods are inserted into the sides, then gears inside turn the rods in opposite directions to move the windows along the track. Gears have been worn down through the years (installed in 1960s ish). No idea on make/model, only visible marking is "patent pending". Not looking for identical part, just something with the same functionailty.
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Paul from SWISCO responded:

Thanks for your patience. Do you think that our 39-076 center gear operator could work for you? Make comparisons between yours and ours and let us know what you think.

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