Phil, my local BB still seems to have lots of copies with the bonus disc...more than they had last Tuesday at dinnertime, in fact. You might see if you store has copies, too, and if so perhaps they will exchange it out for you. It doesn't hurt to try, right?
You could always buy the bonus disc version from the store, then return the non-bonus version to the store using the store receipt...it's the same UPC/SKU, as I recall.
Just wanted to follow up; my copy arrived today, with the bonus disc. Asside from the one day backorder, this transaction has been flawless. Come to think of it, I have yet to have a problem with bestbuy.com. Now if only I could use my RewardZone membership with bestbuy.com....