no idea tbh, best bet, competitor would probably still be able to get a copy to you by tomorrow morning, probably cheaper than a dig download version aswell as they never seem to drop price much for downloaded copies. Erm, other option i guess, some of the gold seller type places sell accounts, though probably nothing cheap, but some do just keys for a new account for cheap. If that was the case you can sign up for an account with that key and download any old copy.
Depending on your connection anyway a boxed copy will probably be standard copy, in which case you'll have HUGE updating to do. GO to gamershell.com and download the latest ISO (book 12 i think, or book 11 + the book 12 update), you can do all the updating and downloading before you get box delivered tomorrow.