So the problem is that those metal hooks are actually apart of a bigger metal structure that attaches to the body of the device. Their's a video that shows what I'm referring to [link|https://www.youtube.com/watch?v=0bG9kz4MTLY|here|new_window=true], at around the 12 - 13 min mark. If you want to find a replacement keyboard, I'd start looking at eBay or salvage one from a junked MacBook.