Well, I have very little experience with Winchester's customer service, but I can tell you for sure that as of about a year ago, Winchester would still send you a new firing pin if you called in your serial number. I had a Win Model 100 that sat in my closet for about 20 years. I never did the recall repairs until I decided that it was time to trade it off. I just couldn't trade it away without making sure that a known issue had been fixed.
I'm a lawyer, but I'm not your lawyer. If you need some honest-to-goodness legal advice, go buy some.