The light bar they use right now is the Code 3 Javelin. Yakadafi (now known as EVI) made a realistic FHP CVPI a while ago, but it isn't up anymore. I still have a copy of it, but the only problem is that since it is one of his earlier models the light bar will disappear once you get a certain distance away from the vehicle. This isn't a problem when your driving it because your close but if you see another unit driving or you start walking away it will disappear then re-appear when you get close again.
Here it is: http://www.mediafire.com/?y1wz15uyvojuyt1