Come to the Anime Vegas monthly anime show at the West Charleston Library. This month it will be August 21st. Just ask for Rich ^^. Plus, if you come on the 21st show, your donated money can be used for raffle tickets! Check out the other Anime Vegas page at http://www.animevegas.net
Sorry, but most anime conventions don't allow original costumes. One of the important parts to judging a cosplay contest is to see how well the entrant recreated the character. You can't do that with an original costume ^^.