Join Date: Feb 2008
Location: Southern California
Very common issue. They get pretty heavily oxidized. You could try bringing them back with one of those headlamp restoration kits sold at any auto parts store, but usually the plastic gets so brittle that they'l crack if you put too much pressure on them. I tried to pull a pair from a parts car once, and they just crumbled in my hand.
They turn up every so often on eBay and I think Centerline occasionally has them in stock. They're expensive for what they are, though. Euro versions are orange, I believe.