Just contact a bunch of dealers, tell them what you want. Look up the invoice price on Edmunds and offer to pay that and no more. Have them show you the invoice. Someone out there will sell it for that, especially if it's a 2011 unit they're trying to get rid of. They have holdbacks on all models and some have dealer cash incentives. Not sure if you're wanting to buy a warranty or finance it through the dealer, etc., but things like that make the dealer more willing to sell you the car at invoice if they can make $ on the back end of the deal. We bought my wife's 08 Milan for invoice, took the rebate, and got a low APR from the bank, so it was a win-win all the way around.
It's not difficult to buy new cars at invoice these days. People are smart, the internet is out there, and dealers know this. They make $ on the back-end of new deals, and used , ahem, certified pre-owned, is their bread and butter.
I just looked up the 11 and 12 Edge on Edmunds and it looks like there is no dealer cash on them currently. They are offering special financing or a puny rebate.