I'm guessing that you might not go for the full on 'Eyes Wide Shut' (a la Dash) style topless, lace masked look, but the cameo choker is doable, non?
Just buy a wide black velvet ribbon and add this.
Well coiffed and cashmere covered, we get the good girl ingenue complete with a diamond cross from Tiffany & Co. Perhaps the full on 1950's style Nina Ricci sweater and skirt are too much coverage for you, consider instead the diamond cross because it is a classic.
Of course you could go to Tiffany's and buy it for $8750 with the in store experience and the little blue box. Or you could skip the hassle of going to the store because Beladora has the same diamond cross for you for $3500 less than the Tiffany store price.