I was in France and after work, I got to spend about an hour with two Euro First Edition bikes last week. I was specifically looking for differences between the American and Euro bikes, even taking a cardboard tracing of my seat's profile. (a side silhouette view)
Turns out that I didn't need the cardboard profile, as my immediate reaction to sitting on the non-US bike made it VERY clear that the only differences are the seat cover and the part number. The cardboard just confirmed that the US and EU base and foam shape are identical.
If you really need the side of your US bike to be silver-gray, yes you could order a cover and pay through the nose for it. But I'm not even going to post a part number as it'd be cost prohibitive. Simply take your seat to almost any upholstery shop and pay a fraction of what ordering a vinyl OEM cover would cost to go from Japan, to Europe, to the US.
Turns out that I didn't need the cardboard profile, as my immediate reaction to sitting on the non-US bike made it VERY clear that the only differences are the seat cover and the part number. The cardboard just confirmed that the US and EU base and foam shape are identical.
If you really need the side of your US bike to be silver-gray, yes you could order a cover and pay through the nose for it. But I'm not even going to post a part number as it'd be cost prohibitive. Simply take your seat to almost any upholstery shop and pay a fraction of what ordering a vinyl OEM cover would cost to go from Japan, to Europe, to the US.