I made a texture based on Traill County Sheriff Department's F-150.
It may not be exact... I never go for exact copy's (if I was it would not be lore friendly)

http://www.policecarwebsite.net/yet/sheriff1/traill.html
This is where you can find photos of the irl truck..

The texture is transparent so you can change the color of the truck to whatever you want
I suggest any kind of white color

This texture was made to fit with Infidel's DNR F-150 I have no clue if it fits any other F-150 base.
https://modification-universe.com/forums/resources/san-andreas-dnr-pack.34/

here is my discord if you want https://discord.gg/ZTpn8HG