The way it was explained to me when i ordered mine is, the dealer is told the have x amount of cars in certain colours arriving on this date, once every 4 months , they can accept the order or reject it if they feel they wont sell them, my dealer has never rejected an order as there is demand .That order is then allocated to customers , and you can guess who comes last and gets what’s left. There are no factory order numbers as orders aren’t placed with the factory.