Double hook mortise latch replacement

A handy person from Walnut, California says:
Latch was getting "sticky" and finally jammed. Says made in New Zealand. Marked with II.
Is there a replacement?
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Casey from SWISCO responded:

Hi there. Please have a look at our 82-238 double hook mortise lock. Could this work in place of yours? Get back to us and let us know. 

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