It should be doable, especially if you try to make as much of an 'I'm back! But for a very limited time!' splash as possible.
If there is enough time between now and this, consider looking at paying to be featured on AW.
Do you have any off-AW marketing / reviews you can renew or point to?
You could also consider offering a discount to past clients... and forget that you ever saw anyone you have been trying to forget.