I have been searching for this bolt assembly (Win. Mod. 121/Sears Mod. 1) for nearly 5 years to no avail. Recently (late 2013) Numrich Arms/Gun Parts Corp., had one up for auction on e-bay that went for over $200. I have seen the complete rifle on sale for under $200 on the used gun market. The left spring steel extractor snapped on my bolt and I am beginning to think that finding a new/used one is a lost cause. I'm sure a competent gunsmith can make one but the cost would be prohibitive so that is a moot point. Sorry I could not be of help.
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