Window latch replacement needed

A home owner from Mesa, AZ says:
We are in need of a replacement latch for this window. Can you direct me to the correct part#?
Thumbnail of the uploaded file named IWC window Latch
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Bob from SWISCO responded:

Thanks for posting. I'm afraid that this IWC Sash Lock is no longer available. The original manufacturer recommends using the 90-313 as a substitute; however, it will be necessary to remount the holes at the top. You will need to use a screw like our 33-011. You don't want to use too long of a screw, and be careful not to drill too deep, as you could damage the frame or the glass in the sash.

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