I am looking for new headlight covers for my 2003 Discovery. The plastic cover's on the car are currently are very faded and are not looking to great. Do I need to purchase the whole light kit or do they sell just the covers???

 

I'm pretty sure you must buy the whole light kit...check Roverlandparts: http://www.roverlandparts.com/discovery-headlights.aspx

or maybe e-bay.

But...and this may seem strange, get some toothpaste (not gel, but paste) and gently "scour" the plastic cover:
http://www.youtube.com/watch?v=CKAshYmrExc

 

You may also try this http://www.harborfreight.com/12-minu...kit-65938.html

[IMG]file:///C:/Users/Dave/AppData/Local/Temp/moz-screenshot-1.png[/IMG]

 

This is very common on all cars that have plastic headlight covers (DI's are glass)
There are tons of products that you can use to clean them up and make them look like new again, just go to your local auto parts store.