Tom from SWISCO responded:
October 31, 2022
Hello! Night guard isn't a term I've heard before, but every manufacturer calls these parts something different. Night latch is a common one, along with vent latch, vent lock, sash stop, and so on. Yours in particular isn't made anymore unfortunately but you may be able to use our 26-338 as an alternative. Look it over and see what you think. Alternate image for 26-338
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