If neither of these have 1 obtainable, polymerpew.com might be my third preference ,but I think they purchase their's from Deeznutz. The polypew man has a terrific rep to the fbook SS team providing modified triggers IIRC, with a FRT (Forced Reset Trigger) the bolt forces the trigger off reset https://frttriggers01223.daneblogger.com/33179676/the-best-side-of-forcedresettrigger-net