Suppose your laptop key is lost or the hinge lock is broken. And just for one missing key or broken hinge lock you are asked to replace the full keyboard by the servicing centre. If your system is under warranty then it’s okay but if it is out of warranty then it will be a too costly thing. Moreover many companies don’t provide warranty for physical or accidental damage.
Visit the following sites for getting your desired key :
You may also get the same from ebay.com
As I am located in India, so I ordered from http://nehruplacestore.com.And I received the replacement key just within 1 day. Awesome experience:)