If you're looking for the official climax of the series where the number "72" is also prominent, you can find the final manga chapters in Naruto Vol. 72 , which features the definitive battle between Naruto and Sasuke.
Comic Market, or Comiket, is the world's largest self-published comic fair, held twice a year in Tokyo, Japan. C72 was the summer event of 2007. -C72- -Naruho-dou -Naruhodo-- Tsunade no Inchiryou -Naruto-