Searching for Window lock 876

A quick learner says:
Thirty three year old windows. Purchased from Insulate Industries now PlyGem.
I call it a window latch. Only identifier on back AS and number 876. What would you suggest?
The latch is rounded. We need 18
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Casey from SWISCO responded:

Hello,

Unfortunately, we do not carry an exact replacement for your lock but it does remind me of our 90-050 , 90-193 , and 90-023W latches. Take a look and see if one of these options might be adapted to work for you, paying close attention to the installation hole spacing. Thanks for posting! 

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