There are a couple, three way to get a list;
You can apply to the county registrars office, usually a form for that purpose is available, however there is a small fee per name. But dont be mislead. A penny a name for 100,000 names can get expensive for an individual to bear.
Which leads us to a second choice; contact a local True the Vote type group and see if you can get anything from them. They probably wont share but you can accomplish the same thing as a volunteer.
Finally, the candidates all, routinely, get lists for mailing, door knockers, etc. Perhaps a local candidate of political party can help. You can always contact the state party committee. Again, if you want to volunteer for some on-going voter audit/review there are lots of folks looking for lots of help.