2 point mortise lock different dimensions

Hello, I am looking for a replacement of a 2 point mortise lock for my sliding door. I came across a thread that appears to have the same exact lock as mine: https://www.swisco.com/discussions/Replacement-for-2-point-morise-lock_fitting-striker-77-202593

I bought the recommended lock and, while it appears to fit into the slot, the holes for the screws and the square peg are too far apart for the dimensions I need. The screws on the side of the lock are about 4-15/16 apart whereas the holes on my door are only about 3-15/16 apart. In addition, the square peg hole is too far back. It needs to be more towards the center of the lock. Do you happen to have or know of any locks that would fit this criteria? I cannot seem to find any 2 point portise locks with these screw dimensions.