Not sure if you can purchase the small black plastic coin tray latches that seem to break rather easy. I was able to fabricate new latches out of metal which is much stronger. I used solar screen latches made by Prime-Line. As you can see in the pictures I started out with the original latch and grinded-off about 2/3 of the housing till I matched one of the original back plastic latches. Be patient and use a #20 drill bit to clean-out the fastening hole. These worked like a charm and I'd be hard-pressed to see them break.
Good luck...........