If you are staying in India, you can get the DVD from even smaller cities. All the music shops in metropiltan cities in India like Mumbai, Kolkatta, Chennai or Delh are having DVDs of hit hindi movies. Also available in NCR like NOIDA, GHAZIABAD, GURGAON etc.I am not sure about its availability in other countries.
fouzanspykid.blogspot.com/2010/09/3-idiots- check this link for downloading that movie for free.
Depends on where you live, but considering the film is such a huge hit and having that Bollywood films are generally popular all over the world - getting the DVD won't be that hard.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.