I’m so sorry that happened and I hope your daughter feels better soon. I’ve seen that blanket pop up on eBay from time to time. Your best bet it to save an eBay search and opt to get notifications when a listing that matches your search is posted. It could take months and It’s quite normal for these “vintage” blankets to run around $100. Also check out Poshmark, Etsy, Facebook, and other online secondhand stores. I’ll let you know if I come across it. Best of luck.