Searching for ctg Temperered 18CPA 1201 II

A quick learner says:
Hello, I'm looking for a replacement part for the locking mechanism for a door (Best I can make out by reading but see picture below:
CTG Tempered
18 CPA 1201 II
SGCC 1804 1/8U
I need the keeper part (2nd pic showing that it is broken)
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Casey from SWISCO responded:

Hello,

Your mortise lock looks like a match to our 82-226, which is compatible with our 89-020, 89-021 and 29-021D keepers. Take a look and see how the dimensions compare to your original keeper. Thanks for posting!

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