This headboard most certainly had to be custom. Look how its shape fits between the oval windows, aligning perfectly and making a beautiful statement in this bedroom design.
The curved notches on this headboard align perfectly with the oval windows, strengthening the relationship between the bed and the wall and giving the room a very custom look.
So this is a little close to your thought of putting the mirrors behind the lamps - I am liking it more and more...I think I have two of those square/rectangle mirrors already - if they are rectangle we can turn them and hang them longwise.
CLIPPED HEADBOARD
the arc would have to be specified by template maybe, or creative license would have to be given. This one has the extra inset (not sure the terminology) but let's price it with/without the extra roll.
So hard to say. Colors look very different depending on your monitor, the lighting in the room, whether or not they were processed, etc etc etc.