Shh . . . . someone is giving away my secret about making a Nightrider light out of the hood scoop! Steve5300, a fellow firefighter, but in flashing LEDs in there. His does not have the nightrider pattern though, so I am trying to see if I can get my LEDs to flash like that . . . .I will post pics if successful.
Otherwise, PIAA DOES make a light that would fit, although you would probably need to cut into the plastic a good amount (I'm not sure how thick the light is). Someone posted a pic of the light, I thought it was on the thread about installing the rear fog/brake/turn signal lights into the bumper reflectors, but I can't find the pic. They are basically 5 or 6 LEDs in a row- white for back up, red for LED. I bet that would fit well, maybe even two, side by side, but again, I'm not sure about the thickness . . . Or how functional it would be . . . .