You must have been reading info on the regular huaraches and not the nm's. No way you can go up a full size. I'm a size 11 and they fit perfectly. I get 11.5 if I can't find 11 and they fit okay as well but they're as true to size as they come.
As for a US release I have no idea. But I have posted multiple links for hotlava over the past month and a half, have you checked out any of them in the previous page? That's your best bet to get them for retail. Btw retail is about $140 give or take depending on the conversion. Depending on where you cop from you could pay anywhere from $10-$35 for shipping. So keep that in mind. On average you're going to be paying about. $165 per pair. It is worth mentioning that my "poison green" nm's only came out to $100 shipped when they were on sale at hanon shop.
I honestly don't think there is an established resell market for these like there is for Jordans. I'm seeing most of the scream greens go for 150-165 which when tax and shipping in some cases is factored in is about $30+ in profit which really isn't that much in comparison to other shoes. Shoes that just release lower in price overtime as the market establishes price. The scream greens didn't just come out they've been out for close to a year now. And now that they're scarce on shelves price is only going to rise.