82-239 multi-point mortise lock

On your website under 82-239 customer questions, a contractor fromSt. Louis, Mo., on Mar. 7, 2017, submitted a picture of a mortise lock he needed. I am in need of the same lock as mine looks exactly the same as his picture. You suggested 82-239 as a possible replacement. Based on the dimensions you show, this would be a good fit. The only dimension you don't show is for the faceplate mounting holes which, as you can see in the picture, are located between the latching hooks not at the far ends of the lock. My measurement is 3 1/8" between the threaded holes that you can see in his picture. Does this match the holes located in part 82-239? Also, does this lock come with the safety button? If so, I would need to drill a hole through the faceplate to accept the button since my lock doesn't have one. Thanks.