Hi and welcome. Sorry to see this has happened to you. At least you are ok as the z is a very robust car. Hope you do not loose any money on the valuation. Best of luck in finding a replacement.
That's disgusting those police didn't spot a woman in the car. Had they took the time to properly look around and the car and through the glass, they would have spotted her.
Have you a motor factor by you that mixes car paint (not halfrauds). They have colour chip books, that they hold against the paint so can get you the closest match.
So sorry to hear this. The important thing is you both are ok. The car stood up well against that big van. Unfortunately the car will be written off, and do hope you don't get left out of pocket. Please keep us informed.