Lauren from SWISCO responded:
February 29, 2024
Hello, thank you for posting, Please start by reviewing the style and dimensions of the 82-226 mortise lock to see how it compares to your original. If a new keeper is needed, take a look at the 89-020 or the 89-021D. If you would like to replace the handle set as well. Please review the 82-030 set that has a 3-15/16" installation hole spacing from center to center. Let us know what you think and if you have any additional questions! Alternate image for 82-226
Hole center dimensions for 82-030
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