Where can I find these types of sirens?

I've been finding these types of sirens in police skin mods, but they don't load when I load the skin. Am I doing something wrong?

 

Kemro has made some vector lightbar mods and probably the author of those skins uses those mods.
Download these and see what happens:
https://www.beamng.com/resources/ne...rshal-suspect-cage-radio-control-panel.15479/
https://www.beamng.com/resources/200bx-with-vector-lightbar.16615/
https://www.beamng.com/resources/vector-lightbar-for-the-roamer-with-suspect-cage-and-radio.15989/

 

Thanks so much!