I really don't have any medical advice to offer you that hasn't already been mentioned, but as far as support groups, the League for the Deaf and Hard of Hearing has chapters all over - I would imagine they have one near you too. They have different programs available and probably some sort of support group for your Mom and maybe even for the family, as this is tough on everyone.
I know it must be frustrating. My Dad was diagnosed with a small AN a few years ago and he's been watch and wait. He also has Alzheimer's so he's not a candidate for surgery. Fortunately for him, he has had minimal symptoms, aside from the hearing loss on one side. When he started getting mad and frustrated that we weren't letting him drive, or when we had someone stay with him all the time, his doctor started him on a low dose of Prozac. That seemed to help him deal with all the changes he was going through a little better. Now, if the doctor would just give us a truckload for the rest of the family.....geez...
Good luck to you and your Mom. I hope you find someone who is able to do what's best.
Lori