JanSport backpacks.
My wife had the zipper wear out on the backpack she has had for ~20 years. She contacted the manufacturer. They don't make that particular bag anymore so they just sent her a comparable equivalent with almost no questions asked.
Yup they will just send you a new one. I've been using the same black jansport bag for > 5 years. As far as I can see the new ones they sent has the same quality as more than 5 years ago.