I don’t know if the emails are USA only, sorry. I received an email within 24 hours of placing my order at the Lincoln dealer.
I haven’t sat in an Aviator before, but I sure liked the Navigator seats. Maybe you need more “adjusting” ?
Seriously though, how many adjustments do you need? My BMW is the same way. It took me weeks to get the seat right. After my first long drive in it I had terrible back pain. Eventually I did get it dialed in though.
I recently took my son’s new Mazda CX-5 on a long trip, 4 hours each way. Fewer adjustments, but I had it perfect in less than a minute.