Here are the key features:
Inside screws are hidden under plate
Spherical knobs, note the lock side has a little collar at the back of the sphere
Locking mechanism works as a push button or can be turned to "always lock" (key entry does not unlock the mechanism)
Center section nearly fills the door hole
Can be left or right (keyway can be flipped)
I can provide more info if necessary. Again, I'm looking for an exact match or model, then at least I have something to look for if they are discontinued.

