Not that this would help if you already have Atb, but this expansion is listed as one of the bundle packages if you get the base game, That's how I got mine. Hopefully this doesn't mean the other expansions are going out of print also. With them upgrading to 2nd edition, AG may get around to reprinting this, especially if there is demand. Try contacting them direct and asking.
If you get the base awakening the bear 2nd edition?