W140: Front Corner Headlamp Replacement

[BJL-600SEL]

My front left corner headlamp cover (amber colored) fell off while driving. All that remains is the loose bulb and socket w/ wiring. When I turn on the lights, the bulb does not illuminate.

Is the amber headlamp cover something I can replace myself? How is it done?

Where can I get a replacement part?

Thanks,
BJL