The panel is available through any mercedes dealer. If you look closely they are on all my cars. The pic with all three cars shows the 500e without it's blank panel yet as I had just purchased it. I have bought 6 of these so far, three for the 500E, two for the Black 300E. The rare one is for my 87 Black 300E, it has NO screws visible, and I wish the others looked just like it.
I can get you the part # later. It's cost is about $100.
Rich
Shadowgriffen, how about some of headlight pictures?
Here's a better look at the front and rear ends for you.