Ordering a custom Raptor at/or below invoice is going to be tough. Reach out to Zook Motors Ford in PA. They were one of the only dealerships that were selling Gen 2s at invoice in 2017 and 2018—they did the same thing on Gen 1s. Joe Rupp is who I dealt with. Last time I talked to Joe was June of 2019, and they were selling Gen 2s at $1k over invoice. Don’t know what they are selling them at now.
Also, there is no telling how long it will take to get one if you custom order a Raptor. With the transfer case plant being damaged in SC, there are a lot of unknowns. You will probably get your best deal finding one on a lot somewhere—that’s the only way you are going to get into the holdback numbers.
What color and options are you looking for? I didn’t buy my truck with graphics. I probably still know of a few dealers in the southeast that have such trucks. But I imagine there should be some up near you too. Lol you just have to painstakingly going through each ad on cars.com looking up window stickers.