Your best bet to get an age related plate is to buy another Granada donor car.
Any condition will do so long as you can take pictures of it and it has a V5C in your name.
You then just need to use two major components from your 'new' donor car to qualify for an age related registration plate.
You'll find all the details here....
https://www.gov.uk/vehicle-registrat...erted-vehicles
Of course that is after you passed your IVA test!!
Just found this on the web....
http://www.classic-kitcars.com/image...7888-lambo.jpg