Hey sky sorry it's taken so long to reply. Yeh the programmable aids are pretty decent, they are programmed to your individual hearing loss unlike the analogue ones that are a bit hit and miss. But when you get them (which i really hope you are able to!!) remember they will sound different, people often say they sound quieter but they're not really it's just the analogue ones make everything loud whilst the digital ones are more clever and only increase the volume of some freqs etc so are better at providing clarity which is usually what ppl need over loudness.

Yeh you are right - there is a connection between diet and Meniere's . Basically the first medical management for Meniere's disease is a low salt diet as sodium seems to be a trigger. Also try avoiding caffeine, nicotine and chocolate if possible. Drs also prescribe diuretics for meniere's disease so maybe you could try this if you have not yet?
I've been doing a study of intratympanic gentamicin injections for meniere's disease. It is compared to surgery so usually only used in extreme case but it is not really invasive like surgery. It hasn't been fully studied yet but it is widely used as a treatment so maybe it is something of interest for you to look into prehaps?

I'm really sorry you are struggling so much. I wish i could say something to make it all a lot better. But there is some good news, usually Meniere's disease will burn out eventually after a few years. Unfortunately though any hearing loss will remain and balance will be compromised, but the brain is very clever at stabilizing this.
If you can i'd recommend that you get the new hearing aids as balance involves your ears (hearing and vestibular), vision, and joints so the more you compensate on one the better balanced you will feel.

I hope this is of some use.