Puppy finding help in TN?

I'm looking for a new puppy. I'm looking t 3 breeds in particular: Bull Mastiff, Boxer, and Golden Retriever. I live in northern Tennessee, right on the boarder of Kentucky (Middle TN) in a small county. I live on a 3 acre lot right outside city limits. I'm surrounded by woods and have a creek. I'm having trouble finding a breeder for these puppies, so if anyone knows any breeders that have fairly reasonable prices for these breeds, I would really appreciate info. I would appreciate if breeders stayed in northern TN and Southern KY. If you would like to recomend a breed too, that would be fine. Thank you sooo much.