I had a similar thing back when I bought my 2009 SL-R. The production version was a black top sheet but low-and-behold I saw a photo of an SL-R with a white top sheet. I reached out to NS, they let me know that that it was in fact a limited run due to running out of black material during a production run one day and so they finished that day's run with white material. They pointed me to the shops that they shipped the white top sheet boards to and in this case one of them was evo.com.
I called evo, who only showed the black ones on their website, and they sent someone into the warehouse to look at what was there. They found a white top sheet version I was looking for in inventory and shipped it to me.
It was awesome customer service across the board - both NS and evo.com went out of the way to help me out.