casement window operator and handle replacement

A quick learner from Tioga, North Dakota says:
I am in need of a replacement casement window operator and handle. The handle broke off of the pin, and the operator gears seem to not work correctly when closing the unit. There is a stamp on the underside of the operator that reads OP06-7504-00 and then directly under that is this: 02-15-07 78126

There is an raised number also on the unit that reads OP06-1507. And then on the top of the unit next to the screw holes is the name ROTO.

The hand crank folds over onto itself, and on the bottom inside of the crank is the number OP06-1520.

Both parts are white.
User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Hello! Please see our 39-253L and 39-253R, these operators appear to match what you have pictured here.
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