SGD-R20 96x80 mortise lock

A quick learner from 77433 says:
Need to replace mortise lock, what part number do you recommend.
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Tom from SWISCO responded:

I recommend the 82-229, to start out anyway. Carefully compare the dimensions and pictures on its store page to your old part and let me know if they differ in any way, or if you just had any questions.

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