I disagree, Sunny. I would bet that the front U.S. license plate frame for the NSX is interchangeable with the Euro one.
Remember, the holes that are drilled on the front nose to accommodate the license plate frame have nothing to do with the size and shape of the license plate. These holes are for the bracket behind the license plate, not for the holes in the license plate itself. The screws are inserted vertically (upward) through the bracket and into the nose. I would bet that the Euro cars and the North American cars have these vertical holes in the exact same place behind the front bumper.
You can see what I'm talking about in the NSX service manual
here (dial-up users beware). Go to page 874 of the .pdf file, which is page 20-48 of the service manual. At the lower left corner of the diagram, you see the license plate frame. I would bet that the two "arms" which extend backwards from the license plate have the same hole spacing in them on the Euro version as on the U.S. version, to meet up with holes in the bumper in the same location, so that the frames are interchangeable.
NSXGOD would know for sure.
Of course, most of us in the States don't use the front license plate, even those who live in states where it's legally required (but not rigorously enforced).
[This message has been edited by nsxtasy (edited 07 December 2002).]