I was surfing Ebay Home Audio a week or so ago and I came across someone selling what looked like the Horn Rings from a set of Advant Garde speakers. But these were actually made to retrofit to non Horns. They were finished in auto paints (green, red, silver, gold etc..) and looked like they were made out of die casted metal or some hard abs plastic or something. Has anyone else seen these before? I wonder what they do for the sound.. I would imagine they would kill near field off axis response but would gain you a couple more decibels of efficiency?