I did my own trigger job after Googleing " how to do a trigger job on an axis".
You tube videos. Pick one you like. I am handy, but am far from being a gunsmith.
Seems like the fix was to cut off 1 or 2 coils of spring to lighten pull. Whatever it was . . . it worked! Don't spend more on triggers and such, do the work yourself. If you screw it up . . . then buy parts.