Replacement casement lock for Roto HG04-2001 window

A quick learner from Rochester NY says:
I need a replacement casement lock for the left-hand Roto casement window.
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Casey from SWISCO responded:

Hello,

We'd be happy to look into this for you but we would need to see photos of an intact lock assembly removed from the window. including the arm or fork that connects the lock to the internal window linkage, to compare to our inventory. Thank you. 

A quick learner from Rochester NY says:
Photos you requested.
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Casey from SWISCO responded:

Thanks for getting back to us. Unfortunately, this locking handle has been discontinued and no substitute has been found. I'm sorry that we won't be able to assist with this repair but please let us know if you have any other hardware questions. 

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