Pela lock keeper part needed

Thanks for your post! The mortise lock you have here is the 82-218 Mortise Lock. It is compatible with a few different mortise locks we supply. To narrow down the correct replacement, you'll need to compare the dimensions to determine the bet fit for the door.

They are the 89-020, 89-021, and 89-021D. Each of their dimensions can be viewed on the website.