Suggestions for lock and handle replacement

Thanks for posting. Without seeing the original mortise lock I can't be entirely certain what you need, but based on the hole spacing and the handle set I suspect you might need the 82-226. Review the dimensions below and see what you think.

Alternate image for 82-226

For the handle set, the hole spacing looks 3-15/16" to me, center-to-center; please confirm. If so, a number of handle sets are compatible, including the 82-030, 82-020, or 82-032. Let us know if you have further questions.