[http://www.ebay.com/itm/like/400811429015?lpid=82&chn=ps|Here] is the replacement keyboard for your model. You can follow the [guide|4516|iFixit guide] up to step 29 and use [https://www.youtube.com/watch?v=gLbasVD69xo|this nice walkthrough video] to help you in your repair. In terms of tools, I recommend the [product|IF145-167-4|Magnetic Project Mat], [https://www.ifixit.com/Tools/MacBook-Air-5-Point-Pentalobe-Screwdriver/IF145-090-3|P5 Driver], [https://www.ifixit.com/Tools/Spudger/IF145-002-2|spudger], and [product|IF145-028|the 26 Bit driver kit]. Best of luck!