I have a hi-standard model h-d military. It is 80% at least outside but it has the common recoil spring,rod,cup problem going on. Anyone who is into hi-standard will know what I am talking about. Is there any place to get good parts these days? Also any site that would have a view and instructions on the correct way to field strip or even better totally strip and assemble this model. It is the model with hammer of course and has a screw in front of trigger guard not the button. Any help would be greatly appreciated.