We already ordering oem parts for the ecoboost mustang, including the intercooler.
Thing is with the 9th gen is that it's still new, it's been out since 2012 and there are, like 2-4 FI options out there? No one really tracks or autox's the car. By comparison the 2015 wrx has been out for 3 months and there are already intakes, exhausts, suspension, oil colers, intercoolers and some shops are already developing whole turbo kits using different manifolds and downpipes.
The 9th just simply isn't there, the 8th will be the bigger modding platform for years to come.