Made this latch in Fusion360 to hold one of my doors closed that kept swinging open. It can be oriented left OR right depending on which body, 3 or 4, is screwed on with the latch part itself being just simply turned around. I personally used PLA because of color choice, but use the strongest filament you think it'll need. I used 25mm wide, 2mm thick adhesive strips to mount this to the door after cleaning. There's a recess in the back of body 1 & 2 that is 26mm by 30mm and goes in about a millimeter. The ends are screw on pieces to remove the requirement for excessive support when printing it. If you really need strength I recommend increasing the temperature and wall/infill count to reduce the chance that the layers separate, print profile includes 100% infill.

Fusion360 file is included for any mounting or other changes you may want to make. Total width of the latch at default 100% scale is 125mm by 30mm and sticks out about 27mm once assembled. The middle has a gap distance of 40mm and a depth clearance of about 19mm to go over a bump between the doors or whatever

The adhesive strip I used (1 inch thick) is found here: https://www.amazon.com