No, there are no blue spruces in Sweden, there are plantations where they grow them, they're very popular as christmas trees.
Making the inner part green is easy, it's just a matter of changing the hue on the texture and it's done in no-time.
I know they are native to Colorado and the nearby states of the U.S but there a popular decoration tree in the US, I live in CT(on the east coast, not far from New York) and I see them all the time. Mostly in peoples front yards. But out in the woods too, here and there.
Thats cool to here about the green, I mean you can't really see unless you get close(well some you can, but I think the more blue ones look better) but its cool if you do it. So are you planing to use one of those other models for it?