Searching for Cascade casement window lock replacement

A quick learner says:
I have Cascade windows, and on one my my casement windows the latch for the lock broke (it just flops up and down, but won't lock the window). I assume I need a new latch?

I've attached a picture of the latch below.

Thanks, Mark
casement lock
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Tom from SWISCO responded:
There are quite a few different locks that might replace this. It would depend on the size of the fork, which is obscured in your picture. Take a look at the list of parts I made on the right hand side of this page and let me know what you think.
How to open a casement window that has a broken lock
How to open a casement window that has a broken lock
VIDEO
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Anatomy of a casement window
Anatomy of a casement window
VIDEO
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How to Replace a Multi-Point Lock on a Casement Window [1080p]
How to Replace a Multi-Point Lock on a Casement Window [1080p]
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