LOL, you just need to haunt the gun shows.
I saw a nice condition Iver Johnson Sportsman like mine at the last one for $150 asking with a tag on it that said it was missing something inside. It was in great condition and I >almost< bought it. A $10 or $15 part from Numrich in the states or make the part yourself and it would have been back into shooting condition. But I figured why do I need it and left it to someone else to pick up and gloat over.