Hi mate. I'm sure that you have done your research, but here is a good article about different treatments which might help with your decision:
What are CROS and BiCROS hearing aids?For people with severe hearing loss in one ear, devices known as CROS or BiCROS hearing aids are a possible solution. They work by picking up sound in thewww.healthyhearing.com
I had some difficulty in finding a helmet that would allow me to wear my hearing aids when I ride. I wear a Shoei RF1200 normally, but it's almost impossible to get it on without displacing the hearing aids. I found a modular helmet that the whole front pivots up and the helmet can be pulled to spread out the opening and fits right over the hearing aids without any problem.Just making decisions about hearing devices and like the idea of being able to hear again while riding.
I am totally deaf in my left ear and slightly impaired on the right.
So I need now decide on what system I should get that I can use with a helmet. Hearing aids CROS or Cochlear implant.
What helmet solutions are others using?