Fenestra Casement Operator Replacement

A purchasing agent from Vergennes, VT says:
I have four windows that had Fenestra 52-01-R/L operators, and they need to be replaced. Do you carry anything that would be suitable?
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Casey from SWISCO responded:

Hello,

We'd be happy to look into this for you but we would need to see a photo of your operator with the window open so that the arms that move the sash are fully visible to compare to our inventory. In the meantime, you're welcome to look through our selection here. Also, see the videos related on this page. Thank you! 

A purchasing agent from Vergennes, VT says:
Here are some photos:
Thumbnail of the uploaded file named Crank arm
Thumbnail of the uploaded file named Crank base
Thumbnail of the uploaded file named Crank assembly
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Casey from SWISCO responded:

Thanks for getting back to us. Your crank resembles the 39-354 at first glance. See the dimensions from our product page below to confirm. We also offer the 39-353 opposite-handed version. Take a look and see what you think.

Alternate image for 39-354
Alternate image for 39-354

Side profile view with measurements
Side profile view with measurements

A purchasing agent from Vergennes, VT says:
That looks to be the right one. Thank you!
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