Hey, if anyone is interested, after many years searching for a spring and plunger that fits in the trigger that activates the cylinder stop on first and second model.38 da., I have finally found one. Here are the measurements, They would be simple to make. Plunger- height 0.141. thickness 0.122. Spring height 0.328 thickness 0.120. I hope this helps someone cuz these parts are near impossible to find.