Just because they didn't reply to your request doesn't mean they aren't there.
However, for some reason Mississippi does seem to have less knifemakers than one would expect. The Knives Annual only lists about 15. Most states have a lot more. Rhode Island has 7 listed.
There are many makers in the surrounding states.
They used to hold a show in Biloxi that had a lot of makers at it.
If you really want to polish your skills, consider attending the ABS Moran School of Bladesmithing in Washington, Arkansas. They have classes in many specialized areas, like handles and guards or engraving, as well as the general introduction classes.
There is also the Piney Woods Hammer-in held once or twice a year in Washington, Arkansas. It has classes for two days with great folks to teach as well as to meet and chat with. You will definitely meet some MS makers there ( both types).