most any hardware store, farm supply store, NAPA/ auto parts store should have an assortment of small springs for just a few cents, also the 10 x 32 half inch long pan head screw for 50 cents. Snip off about a half inch of spring to start with. The springs I found fit tightly on the screw, just twist it on. I think on ebay there are new 'stepped' springs that fit right in the hole like the original hard spring, but they are softer. Never have tried one, the $1 fix works really well. Sure helps if you can find a trigger pull guage to use.