When the USFA parts dry up (soon): Hammer - Pietta w/minor fitting, Trigger - Uberti or Pietta, Hand - Uberti - some fitting, Bolt - I don't remember, Cylinder/Bushing - Uberti w/minor fitting, Trigger guard/Back strap - Uberti bolt on or minor fitting. If you need more than that ... Buy a new gun. Oh yea, Springs - Colt, Uberti, Pietta and after-market. If you need to replace springs, I recommend "Lee's Gunsmithing Gunfighter" or VTI Gunparts reduced power main springs and Pietta trigger/bolt springs. I don't like Wolff.
Coffinmaker
PS: Some Colt parts will also work, but Colt parts are some pricey ..........