The screws to mount the camera are the hard ones to find, I used the ones that came with this,
I had already broken the base part so it was just sitting there doing nothing.
Insulated hookup wire will work too. It may not look the best but it will hold it in without shorting anything out in the process. Just put a knot in the wire for a spacer.
I got lucky and got a whole bunch of long screws that fit those Pi stand offs from a dead laptop.
I mounted a version 1 camera in the official Pi Zero case. I had to enlarge the peep hole so the camera snapped in snugly though. It was the only way I could get it to snap in firmly, without maybe breaking it?