I phoned S&W today. They have the part but will not sell it to me. They want me to ship the whole gun to them for repair (not under warranty). The guy wouldn't even give me the part number.

I then phoned LSG Mfg (lsgmfg.com). Frank has the part but will not sell it to me saying there are dire consequences if the extractor is not properly fitted.
He charges $100 for the job and all I have to ship is the slide.

He'll test-fire the slide using his own frame, barrel, etc. You'd think the perfect test would be to use my entire gun.

Too bad the extractor is not a drop-in replacement.