I don't think that you embellished at all. I'm just saying that, even reading only your POV, it's not at all clear to me that the retailer was in the wrong re. the transaction, though the threat to sue is pretty regrettable.
As for the distinction between a special order and a regular pre-order, the potential loss to the retailer is the same, since in either case, they added to the order for you. If you had not put down a deposit to secure the items, and had merely expressed interest "Cool - please tell me when something like that arrives", then you would not have any obligation to complete the transaction, of course. But a pre-order comes with an obligation to do so.