Buy them online. Your best bets are eBay and lightinthebox. I got a Shikamaru Nara costume from LITB.
Dressing as a character from the anime "Naruto."
The company called Milanoo owns Naruto Cosplay. This company has a large variety of Naruto Cosplay a fan would enjoy buying and wearing on. They also have current Naruto clothing an updated fan would also enjoy.
depending on what you are looking for you can use different places. for naruto shirts go to the naruto store of the site www.naruto.com or you can also try eBay. for naruto cosplays again you could try eBay or you can also get cosplays from www.cosplaymagic.com which is where i have gotten a deidara cosplay from
There aren't any specific "Naruto" cosplay shops. Most carry all different costumes. The best one's happen to be online stores and the best online cosplay store happens to be in the links below :)
A good cosplay place is http://www.cosplaymagic.com.
Choji from Naruto?
Ebay
See CosplayMagic at the related link below .
Google Directory Cosplay http://www.google.com/Top/Arts/Animation/Anime/Fandom/Cosplay/ Anime Costume resources: http://anime.about.com/od/cosplay/tp/aa12.htm
hinata
You can buy them on this site http://www.cosplay.com/costumes/
Well, I would wanna be Rolo, since I adore him. But Sasuke's cosplay outfit is much easier to get.