Through the AA shopping portal, you can get 2000 miles if you sign up for a trial of the economist magazine. It's $12 for 12 weeks; you can cancel after that.
I did this same offer through the AS shopping portal a few months ago (and just canceled). It takes a minimum of 45 days to post (because you don't get the bonus if you cancel before then). So if you have about 2 months, that would be an easy way of getting the miles.