The Wolff or Wilson Combat kit has different weight springs for the trigger & hammer, the plunger springs are listed on Brownells & I think Midway has a listing now .
If your gonna go for a liter trigger let me recommend that you also shim the trigger & hammer to center em & reduce frame drag , shimming will also make the trigger pull more consistent.
According how deep ya wanna go triggershimms.com has different "packs" made just for Ruger DA/SA revolvers!!
Somtimes I up the anty & use CCI 400 sr primers on primer powered fun stuff & so I settled on the 10# triggerspring for positive reset & the 12# hammer for 100% reliability !!
I can handle a heavy trigger as long as it`s smooth/consistent !
1 of the worst offenders on the GP style triggers is the well the trigger return spring plungers rides , they must drill em out with bits from the trash pile ,but it`s easily polished with a 13/64" drill bit & fine lappin compound .the next is the hammer strut itself it`s stamped part & 1 side is very sharp , smooth the corners while ya got it apart ,& don`t forget the little slot it slides thru on the frame stirrup.
Enuff for now , oh if ya have`nt had the trigger out don`t pull the trigger with the group out of the frame , the cyl latch/pawl will move over & spring/plungers will eject to partsbegonesville!!
Until ya learn the in/outs of handlin the group do ya disassemble/reassemble in a gal ziploc to catch em
GP