One of the best things I can think of is to go to your local health department (usually a county health department) and ask them for information, they will usually have information about what the county or even state has to offer for assistance for hearing aids. I am Native American, so I get my hearing aids through my tribe but before I knew that I was Natove, I had insurance paying for them

In my area there are agencies for deaf/hard of hearing. For me its called "resources for independence". I'd suggest contacting a Deaf school local to you or DORS or some similar agency for resources.