I have a 1995 ls400 and my metal headlamp diffusor broke off the headlight. Anyone know where to just get a replacement part? It attaches to the back of the headlight with a phillips screw.

 

As far as I'm aware, it's all one assembly. Your best shot is to get a whole unit from the junkyard or a self service yard to save money.

A photo would be helpful, but I believe the headlight is not sold in pieces.

 

car-part.com to check your local junkyards for a replacement. or glue it back on.