Yesterday I bought a used lens and installed it today. It wasn't all that easy: The book says: Snap out - snap in. But this lens was fastened with one screw in the upper L.H. corner and the head of the screw was sealed with epoxy. But first I had to remove the sidelight and the lens of the sidelight was loose. I am using J-B Weld to glue the lens back on and hope it holds. The housing is ABS, the lens acrylic.
What is the difference between the euro lens and the DOT lens? Can't be the light output, must be the light pattern. On my lil' red car with euro headlights, the low beam is angled up on the right side. It is to light up the right side of the road where pedestrians may be lurking.