I'm going to play the devils advocate here and propose the following:
From what I've read so far the primary mechicanical problem is the top lever spring. If there aren't other broken parts, and the gun is still on face, and the barrels in usable condition as stated and the stock doesn't have to be replaced why not do the following:
Make the mechanical repairs including fixing the buggered screws and do a surface restoration which would consist primarily of rust removal and perhaps a stock cleanup. Then use the gun as is. I agree it's a low grade but it's certainly well made if it cost $185 back then. It certainly wouldn't be a beauty queen but you'd have a 100 + year old original gun that's in shooting condition.
Just my thoughts.
Jim
