Note: The interior police equipment and flashers shown in the screen shots are not included.
You can get them here:
https://www.beamng.com/resources/gavril-led-flashers.2211/
https://www.beamng.com/resources/interior-police-equipment.3180/

Belmont Police Skin Pack 1.1
A fictional police skin for the Gavril Grand Marshal, Roamer, and Vanster