Crank for windows on porch

A home owner from Rochester, NY says:
My house was built in 1973 and the orfinal crank windows are in the porch that is a 3 season room. The windows are in good shape but need new cranks. The windows were either Anderson or Pella I believe. Is there any way to get replacement cranks. I was unable yo fine this specific crank in Lowes or Home Depot. Please contact me if more info. Is needed.
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Casey from SWISCO responded:

Greetings from SWISCO. I think we may be able to help with this. To start, we'd like to see an additional photo showing us the link arm of your operator. We will have a look and see which of our replacement options can be recommended. 

A home owner from Rochester, NY says:
I hope this is what you needed to see. I apologize for the delay. Please let me know what other info.is needed. Thanks so much for your assistance.
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Bob from SWISCO responded:

Thanks for getting back to us. Start by looking at our 39-025 and 39-026, or possibly our 39-193 and 39-194. Carefully go over all the dimensions and let me know if one of these sets match what you need. 

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