the flashing lights are simple to make yourself , i used to wire up units to flash the headklights for tow trucks, it basically just takes a on/offswitch and two turn signal flashers. the red and blue lights your looking for are hard to find because they are only for emergency vehicles , if you get caught with them make sure you have bail money in your pocket as you most likely will be arrested on the spot for impersonating an officer.
i had wired up my 86 caprice with just the flashing lights with a hidden kill switch for the circuit. was out one night and my buddy decides to turn them on driving down the highway. thank god i had the kill switch hidden , i sat at the local cop shop for 2 hours while they tried to make my cars lights flash so they could bust me.