Replacement parts for Casement Windows

A home owner from Cincinnati, Ohio says:
I'm looking for replacement parts for two(left and right)casement windows. Also the cranks that I have are nesting cranks I would like to have the regular cranks instead of the nesting cranks. Any help would be appreciated. Thank you.
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Casey from SWISCO responded:
Take a look at the video below that will help you choose the correct Encore operators for your windows. Both of these options use the 39-451 and 39-452 cover and handle sets. Thank you!
Comparing the 39-253LB & 39-438B Operators
Comparing the 39-253LB & 39-438B Operators
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