Study up before you go Diode Kit. Some late model Fords have lighting controlled by the car's Body Control Module (BCM) and may/may not also be LED. IF that is also true of F-150 then I believe you have no choice but to go separate.
There are what they call "international" light assemblies. Foreign countries don't have the reflector in one position of the light assembly. Instead it's a bright marker light for use in fog. You might be able to replace Domestic with International and end up with an extra bulb position. IF it's not BCM controlled too...