I can identify with your frustration, my family when through a very similar issue trying to buy our current home.
Step one, have your Realtor set up a search based on the address, this will send you an email when it is put back on the MLS.
Two, Be ready to move quickly, when my home came back on the market there were 18 offers on it. Know your comfort zone and be prepared for a Highest and Best call when it is listed again.
You could also spend some time calling the offices of agents that list a lot of bank owned properties. You can call them and ask if they list a lot of BOA homes. You can shrink your list to agents that get BOA listings and touch base periodically.
Good luck, the road ahead is not easy but it can be done.
I would recommend that you continue looking, the time line is not guaranteed, it could be a few weeks or many months before it is listed again, don't get discouraged.
Best of luck,