male ROTO window handle

A handy person from Albany, NY says:
I need one (two would be better, a spare) of these handles because the hex head (5/16") snapped off on one of them. We're using the one remaining to open/close both side panels of our bay window.

It's stamped OP05-1509 on the inside of the handle.

If not available, I saw a Truth Hardware Insert Connector, which if it married up nicely (will sit flush with the base) with a female handle, and has a 5/16" hex head, I suppose that would do the trick, but I'd prefer to have the OEM part.
User submitted a photo of a window operator handle.
Profile picture of Paul
Paul from SWISCO responded:
Please start by looking at our 39-226 folding handle. This uses a 5/16" male pro drive hex stem. See what you think.
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