The easiest and quickest way to do this is to find a headlight repairer, and have them replace the lenses. The Ford parts cost about $300+ each, but replacing the lenses about $100 each. I had mine replaced by a chap in Melbourne.
Aparently it is a common problem with EFs.
The actual headlight assy has to be heated to diassemble the lens from the rest. Not like the old XDs where the lens was like a big baking dish and could be unclipped. (and this is progress???)