Check out this very helpful short video with GREAT tips on clothes, hats, hair and shoes. I bet it's all in your closet, you just got to put it together!http://www.ehow.com/video_4993858_create-costume-men.html
Hats can make the outfit! St Marks, in the East Village is a great spot for super cheap hats. Bowler Hats, Straw round hats, Derby hats, Fedora hats and Top Hats you can find at Halloween Adventure for $20-30.
If you haven't noticed a trend towards 20's inspired fashion, you haven't been shopping lately. H&M, Strawberry, Forever 21, Daffy's, Rainbow, Filene's Basement all have sparkly dresses for CHEAP! Some for as low as $19.99!
And you won't be able to miss the accessories (which really pull the look together). Long pearl beaded necklaces are everywhere for next to nothing, headbands with feathers are in all the stores and on the street. Grab one and wear it across your forehead with a hair pin to hold it in place and boom, you got the look! Or you can drape a beaded necklace like a headband and pin it into place and you have a gorgeous headband! Halloween Adventure and St. Marks street in the East Village has feather boa's, long black gloves, and other accessories like cigarette holders. They also have a Cleopatra beaded headdress that can easily pass as a fabulous 20's beaded headdress. Throw on all the sparkly stuff you got! T-strap, mid height heals were the look for shoes, but heals in general work. If you're feeling really crafty you can get rhinestones, feathers and fringe on 38th St between 7th and 8th for cheap and glue on to a head band and make your own fabulous headdress! Check out this very helpful tutorial on 20's eye makeup. It will complete your look :http://www.youtube.com/watch?