you can get it from cosplay.com
you can buy a cosplay costume online or you can make a costume yourself. There are also many places where you and other people can cosplay known as cosplay events.
Most cosplay stores sell mortal kombat cosplay.
Well if it's just for cosplay you can buy it on a cosplay website (full costume)
It's a specially made dagger and isn't known by any specific name . The dagger is available as a cosplay item .
i would suggest checking amazon or eBay, and if you don't find it, google/Bing cosplay supply websites. most cosplay you can't buy at stores unless you have a local cosplay shop.
Buy the costume.
Buy a cosplay or ask someone to make it for you. Most cosplay websites will make custom stuff. So do some searching.
try Ebay, there is alot of cosplay items available there
One can buy Sango China dinnerware from bedbathandbeyond website, which has a variety of dinnerware. Also popular seller websites such as amazon and eBay may have Sango China dinnerare.
If you need a cosplay fast and cheap the best place to always go is the thrift store that's where I have gotten all of my cosplay. (And I cosplay S. Italy)
There should be a cosplay store in the United States, but if worst comes to worst you can just buy cosplay online.
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