I have never heard of a dupe for cosmetics only fragrance and for that I go to pittsburghstreetsoapworks.com
She makes great dupes of so many of the old and new scents. Go to that homepage and look up a list of scents than go to the scent page and read about each scent. Some are named the exact same name as they are but others like the Philosophy scents go by another name but usually she will have behind them what they are. I love her version of EL Beautiful and that one is spot on for the scent.