Y'know how it is when you think something should exist, but you just can't find it? I have one of those.
Consider the door knob & latch on your standard people-sized interior door. You push the door closed, and it latches. You must turn the doorknob to get it to open. Furthermore, the whole latch mechanism is hidden inside the door. Why can't I find something like that, but sized for cabinet doors?
I can get key locks which I can mortise inside of a 3/4"-thick door. I can get cabinet latches which surface-mount to the face of the door. I'd think I could find cabinet latches to mortise inside a door, but I haven't been able to. Anybody got any leads?