The two ISP-D5 troopers in my neighborhood have what looks like a 800mgz cell phone antenna for 700/800 transmitting in the center of the roof...The low band whip has been removed....
Initially I saw a lot of Comtelco A1183 series 800 MHz antennas on ISP vehicles. Now I'm seeing Maxrad MAX7603S 700/800 MHz antennas. The Maxrads are nice antennas and look good I have a few myself.