How do I make A good Auror Costume From the Harry Potter series ?

Question:

How do I make A good Auror Costume From the Harry Potter series ?

Me and some friends want to dress as a group of generic Aurors from the Harry Potter books, for the two big premiers next month (book and Movie). Not any particularly known character's from the series, but just sort of random Ministry of Magic employees. We really want the right look and feel for the costumes, and to be able to stand out among all the people who go dressed in School Robes. Anyone done this before ?

Best Answer - Chosen by Asker: idk. wait for the movie to come out and then see what tonks and some other aurors are dressed in in the order