Well its depressing that I'm replying soo late to this post but I had wanted to add to this.
I am Going to be doing the same thing, I have just finished a GCPD SWAT uniform and I was wanting to also get a car
For the fun of it. lucky me I live in the Miami area so I wanted to ask what body shop did you go to to do this?
I'm almost certain if I go to any others they would deny making it because I'm replicating an emergency vehicle.
I also was thinking about using a 2012 Crown Vic but the price may bee a bit too steep for that, and you also said you
had gotten the car directly from the Police ( I may be mistaken). I had already gotten most of the equipment needed for it
most of the expensive stuff but its just the small things now that i am struggling with. License plate, pushbar, and just small things.
by the way, If you go to the city and talk to some of the directors you could get your car registered as an emergency vehicle meaning that you can drive without the covering. however it may take a few weeks or months depending on what kind of mood they are in, My friend in Seattle did the same thing and they said it was ok for him to do that. but then again he was just making a small movie replica for another movie.
Anyway if you ever do get this message please get in contact and let me know! it would be great to make another car.