Perhaps Ford already has plans to bring small diesels in.....but NOT from Europe???. They already have proven models manufactured in the philippines where left hand drive AND diesels are the significant majority.
If it werent for the EPA,they would probably already be sellable here.
Checkout:
2.5L, 4-cylinder, DOHC 16V DuraTORQ TDCi commonrail diesel engine
from this website
Ford Philippines - Ranger 4x2 Trekker