Buying it somewhere should be possible if it''s a common type of laptop.
If you can replace it yourself depends on your technical competencies and the tools you have.
http://www.youtube.com/results?search_query=replace+laptop+screen might give you an idea if it's feasible.
Hey guys I gotta say I'm totally newbie to laptop. Yesterday my girl crushed the screen! (I put the mouse on the keyboard and half opened the laptop after wathced a movie) and she accidently close the screen, so..
Is it possible I buy the screen online and replace by myself becoz I checked the repaire store is quite expensive, like quite!!