I used to have the info, but it's been a few years since I've done one...
This used to be the contact info. It may still be the same. I'd call them and check to be sure. If they still honor the recall, they will send you a $30.00 gift card as well:
800-852-5734
or write them at:
Winchester Firing Pin Recall Notice
PO Box 10 Cottage Hills, IL 62018