Southern Tire Mart has commercial tire locations throughout LA and TX along your route. They have good prices and have a reputation of good service amongst truckers. They are a Toyo authorized dealer. CLICK here
for their Toyo page for your size.
Southern Tire Mart
There are several in the Baton Rouge area but the one in Scott, northwest suburb of Layfayette, has a good reputation from what I hear. They are just off of I-10 at Ambassador Caffery Pkwy. CLICK here
for Google map and street view.
Southern Tire Mart Commercial Service Dealer
2209 West Willow @ I-10
Scott, LA 70583
or click here
for further contact information for this location.
Southern Tire Mart also has other locations along your route if you want to choose another one. CLICK here
to find all their locations.