E.W.
You could always call the manufacturer--if you know who it is--and see if they would replace it for you. Sometimes they'll replace it w/o a receipt. You may even be able to talk to Costco about it. They may be able to tell you who the manufacturer is if you don't remember. I have a great set of stainless steel pots and pans. The handles are attached w/screws or bolts or something. Maybe you could just call the man. and just get a new handle for it? I'm not sure if that would work out or not, but it's worth a try!!