Good luck. I forgot where I found my copy back in December. I think it was Miniatures Market and I cleaned out their last copy for like 50-60 bucks or something like that.
The reason why it's so goddamn hard to find right now (not just expensive) is that last December FFG had a firesale and unloaded just about all of battlelore for dirt cheap. There was a rush, and pretty much most of the remaining BL stock went the way of the dodo. Especially the old DoW stock.
They didn't unload all their BattleLore stuff...they still have their Westeros line!(just kidding...couldn't resist)