latch to lock the door

A home owner from Rapid City, SD says:
November 30, 2017
The latch to lock the door broke off. Can you help me get what I need? The print on the glass was very hard to read but it looked like:

GUARDIAN DEWITT IA
ANSI Z97 1-1684 (could be 1-1884 or other)
Safety tempered
SGCC 2020 1/8 US
16 CFR 120I ii
Patio door latch
Profile picture of Tom
Tom from SWISCO responded:
December 5, 2017
Sure, see our 82-107. I believe this can repair your door.
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