Go to the dealer, tell them you want to do a factory order.
Once they pull up MSRP you can make a deal (you'll get whatever rebates are in force at the time of delivery).
If you want to make an offer of invoice minus rebates (they still make money with the holdback & other incentives), then do it & see what they counter with.
If they don't want to deal, then go to another dealer & do the same thing.