buddy you may try 3rd party lcd screens from other website like ebay (but you will have to buy them ....no use if you want to go for warranty).....but as of now the parts are not available in india. here is an example of a website for you ,you can find both lcd as well as touch screen for nokia n900 .But if you ask me Nokia Care is the best option to get your n900 repaired.
http://www.mobile-phone-lcd.com/n900...deu-p-331.html