They are easy to make. Mike the diameter of the trigger pin ( or the pin hole, if you have lost the pin) Then go buy a small drill bit at Home Depot that has the same diameter as the trigger pin and cut off the base of the drill bit the correct length of the trigger pin to make a new pin. Ed.
Pins on the clones are pretty close. Large pin (trigger) is very slightly larger (very minimal) and the cylinder stop pin is very slightly undersized. Just for info.