IWC lock is broken

A quick learner from Santa Monica, CA says:
Hi My IWC window latch has broken and I need a repalcement.
Attached are photos, can you advise where I could purchase a new one. Thank you
Thumbnail of the uploaded file named Pic 2.jpg
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Casey from SWISCO responded:

Hello,

Unfortunately, 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. Thanks for posting! 

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