There are tons and tons of different cosplay shops online. I've linked to them below.
Most cosplay stores sell mortal kombat cosplay.
mortal kombat.com
There are various ways that you can play Mortal Kombat games online. You could buy the latest game for any of the consoles and play online.
I don't believe that there are much stores that sell Final Fantasy 10 cosplay costumes, so your best bet would to be checking online. Online stores have great selections of Final Fantasy cosplay costumes.
On the game
no
You can buy it for either Wii or PS2 at Gamestop used And you can check out individual game pages for the separate platforms here, too: Mortal Kombat http://www.g4tv.com/games/xbox-360/63918/mortal-kombat/
i cant believe im online
I know cosplay locator makes crazy custom stuff like that. But be prepared to pay out the wazoo.
Try QQCosplay.com They carry lots of Bleach costumes.
Only if u want to play online.
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 :)