Emblem of Elendils Family

After quite a bit of searching, I finally found the emblem that is shown in the LOTR-TRTK trailer. Aragorn wears the emblem of the silver tree with 7 stars above it. I’ve been trying to find a good wallpaper and can’t seem to find any. Im not just looking for any, im looking for the exact one that is on his shield/armor. I have found very small jpgs of it, but not wallpaper.
Any ideas???