This is awesome, when I saw the thread I was thinking I wonder what kit would be the start point.
Little did I know it's a 1:1 replica.
It combines two of my favourite things car restorations and modelling, with a dose of one of my other favourite things police hardware.
Good luck sourcing all the parts, I know how hard it can be, my bike is an ex police bike, all the police hardware was removed before I bought it. Trying to find the correct bits to put it back is very hard, it's only a few years older than your car.