Replacement "keeper?"

A home owner from Denver, CO says:
Hello: I am somehow missing one of the plastic parts I am providing pictures of. This is for a left-swing casement window, and is the part that attaches to the window itself and engages the latching/locking arm to close the window. It's 1 3/4" long by 5/8" wide by 9/16" deep and is a hard, white plastic. It you have this part of something similar that you think would work, please advise. Thank you!
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Casey from SWISCO responded:

Hello,

Take a look and compare the specifications of the 38-130 and 38-131 keepers to yours. Thanks for posting! 

Anatomy of a casement window
Anatomy of a casement window
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