k & k window casements

A quick learner from USA says:

I have several K&K window casements that need replacement. Attached are a few pictures that I've taken to help you identify the parts. Could you please tell me if you carry the parts and how much they are? The markings on one of the slides shows number 20810. I need casements for both left and right opening windows. If you don't carry these parts, can you point me to someone else that does?

Thanks in advance for your help.
Gioia -

User submitted photos of a window operator.
Profile picture of Donna
Donna from SWISCO responded:
Hey, Gioia. Check out our 39-031 and see if this is a match for your operator. You may also want to see its opposite hand, the 39-032.
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