Still got the receipt of purchase?
Take it to the police station and they should arrange a surrogate vin number for it. If the vehicle has been previously registered then it should just be a quick check for the police using current vin number.
Shouldnt be too much of a hassle, but yeh, pretty sure a new vin is required from police, then to an engineer to get new vin stamped on car. (this is all from memory and has been quite a while since I've needed to know this info lol)