I contacted the seller for dimensions of the part. According to my measurements, the outer diameter of the "trim" area is 44mm, and the outer diameter of the ignition barrel is 30mm.
Here are the dimensions of the part:
"Part one is the LED board. The dimensions are ext. 50mm int. 34mm.
Part two is the ring that is illuminated by the LEDs. The external diameter varies from 34mm where it fits into the circuit board up to 41mm on the front face. The internal diameter is 32mm."
So I really doubt that the LED portion would fit, but the second part would.
Now that I really looked at it, I have to agree with BetaDnB, it looks like Ford forgot to install a ring. Looks pretty bad actually...