Alienware Predator Alien Head Light Stopped Working

I have a pretty old Alienware case from about 2003 that I have repeatedly upgraded internally.  Here is an image of a model that only differs by color:

media.alienwarearena.com/.../2003_predator_angleshot.png

Unfortunately, the alien head light, which typically turns on when the computer is on, is no longer working.  The wiring seems to be OK, but I think the lamp itself went out.  Does anyone know how likely that is or how I could go about replacing it?  Thank you.