Andersen casement operator

A quick learner from Massachusetts says:
These are Andersen operators. The core is missing from one and I wonder whether a core can be purchased or maybe a core removed from an operator that I could purchase whole, rather than remove the entire operator from the window. I am including a pic of an identical operator with the core and handle relatively intact.
Thumbnail of the uploaded file named window2.jpg
Thumbnail of the uploaded file named window1.jpg
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Emily from SWISCO responded:

Hi there!

The core you're referring to is called a worm gear and it looks like yours came out with the handle. I'm afraid this cannot be repaired or replaced so you'll need a new operator. We'd be happy to help but we'd like to see a photo of your operator with the window open so that the arms that move the sash are fully visible.

Thank you!

A quick learner from Massachusetts says:
Here are a couple of photos with the arm extended. Thanks!
Thumbnail of the uploaded file named window1.jpg
Thumbnail of the uploaded file named window2.jpg
Profile picture of Emily
Emily from SWISCO responded:

Thanks for the additional pictures! This is a huge help. Depending on the length of the arm, you could have either our 39-094 & 39-095 or 39-150 & 39-151. Carefully look over the dimensions for each and see which ones matches up best.

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