Where could I buy the notebook that looks like the real Death Note? Well... I just saw the notebook in my fellow schoolmate and he just brought it to school yesterday. And I'm really curious where he got that and how much did it cost.
Check out these links:

http://www.399animeshop.com/anime/death-note/death-note-book-replica-size.php
http://www.ebay.com/bhp/death-note-notebook

There are different types tho, one type with only the cover looking like the death note, the content is like a normal notebook. The other type is exact replica, figure out which one you want.