Those are a custom color scheme based on actual art from the game, and I'm afraid they don't come any higher res than the ones I posted in the newspost. That would have to be made, if it was needed.
We could ask Relic if they have larger versions of those simple star medals. Maybe they will release them to us. It might indeed be nice to use bigger versions in other places, like on coh2.org player profiles/user pages.
Yeah that would be great. I was thinking of putting it on my stream profile ^.^