I hate doing this
If the scammer has withdrawn the money from the receiving account, it is most likely gone, as the scammer now has the cash in hand. That said, beware of anyone who sends you an email promising to get your money back, as this is a common technique employed by these scammers. After they steal your money, they will email you from an "official" address claiming that they can get your money back... for a fee. This is, of course, just another scam.
I have looked at the "escrow" site used to scam you, and it is completely fake. It has a 2 year paid registry started last month, and the text and images used were stolen from real businesses. I will kill the site, but can do more damage to the scammers if you provide detailed information, including the account the scammers used to receive the money. Please post or PM me the info. An email from these scammers, including the full headers (minus your address), would be most helpful. If you don't know how to do so, tell me what email provider you are using and I will help you.