Wanted 1-3 y/o well tempered dog for service dog in Jacksonville, North Carolina For Sale

Must find an excellent match for our home for our son who is autistic. He has now gone through three trials. We are running into issues of the dog being too shy, too aggressive towards strangers, or major training issues. Looking for an animal who is at least one year old, but not older than three. I would find it helpful if the animal is already fixed. House trained is a must. Animal must be good with other animals, small children, men and women.
If you, or someone you know have a dog that fits this description, please let me know. I cannot have a pit bull, a chow, Rottweiler, or akita/wolfe hybrid. Thank you for your time.