Hey, that is my cousin in law twice removed etc etc.
He is in Toledo.
Olde English is North of Dayton, although I am not positive they have an NFA license. If they are and you are close to Dayton you should look them up.
Peabody's tactical is South and I know they have an NFA license for sure. I have been in their shop to inquire about suppressors and they were very helpful, although busy.
If you give us a city someone can probably make a suggestion.
You have to find a dealer who is a distributor for what you want and then just go and tell them you want to buy one and they will walk you through the process.