Help finding casement extension joint

A distributor from Ballwin Missouri says:
I have a customer installed awning windows for and the hall is to narrow for the pole to be able get enough of an angle to crank it open. Looking for a spline with a double u-joint possibly.

Attaching drawing of the spindle and the thought of the double u-joint.
User submitted a photo of skylight hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. Take a look at the 39-338 along with the 39-339 and see if this is what you are looking for.
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