I have pics of my old headlights that were plastic chromed. I had them chromed when ben did his. Mine eventually yellowed and had a shattered cracked look (after about 2 years) I believe Bens' did the same after 3 or 4 years. HTH
Zed lights suck ass anyhow, I remember just putting the angle down on the lights and using my high beams as standard lights most of the time.