mustang grip pins

[old fart]

i bought two sets of rubber mustang grips from numrich, they fit my service six great except for two things. first they didn't come with a screw, i finally found one that would work at wal mart. but the grips are supposed to have these little pins around it to hold it together. the screw doesn't hold it together good at top and bottom, does anyone know where i can find these pins that lock the grips together? thanks