I hate to be "anti-environment and pro-capitalism", but... just buy a new one. The worst thing about HDDs (in my opinion) is that it's hard to tell when they'll fail. You don't have this problem. Clone the drive, spend $20-$50 on the same storage size, and you're done!
Or double the budget, and upgrade to an SSD. I know it's easy to suggest someone else spend their money, but that's really the only option here...