What I need is a trigger return spring and plunger for my three screw Blackhawk. Gun Parts Corporation is out of these and Ruger will only sell these if I send the entire gun in. They will sell me the same parts for a new model BH, so if these parts will interchange, I'll be back in business. I can't see having to pay $25 shipping to Ruger for a two dollar part. Please help if you can! I'll be indebted to you.