At this point you should have a fully functional kindle cover. (hubpages.com)
kindle paperwhite case kindle case kindle cover kindle paperwhite cover kindle voyage case kindle touch cover group (etsy.com)
If repair is indeed uneconomical, you could consider repairing of the Amazon kindle cover yourself, by using self - adhesive Velcro between the back of the kindle and cover, and leaving it closed for a day or two. (ebookreaderguide.com)