Patio door lock

I need a patio door lock as when it is engaged it doesn't unlock. I also need plate that goes on jamb that it Locks into. Plate sits on jamb not cut out for it.

Overall patio mortise lock
10 1/8

Top hole 11

Center hole 3

Lock hole 6 1/2 center

Jamb plate top holes 10 1/4

Middle 2 7/8

Jamb 1 1/2 deep.

Handle screws 4 center