Does The Dark Knight The Joker's Suit Exist?

yes it does and it's a costume that batman wear's in the movie for example the costume has three layers of titanium dipped fiber's mixed with Armour so batman cannot get hurt but still vulnerable to knives and guns and yes Lucius fox made this suit for batman so there's proof that the bat-suit like in the movie exists although if you are willing to purchase one it's gonna cost you a lot of money.