Fun Fact: If you ever make it to Airline Hwy in LaPlace, LA, you have to go to Jacob's and Bailey's. They both make excellent andouille and they hate each other. They are literally 100 yards apart:
The both claim to be "the Original" andouille. The story is (which I cannot verify) that Jacob's was the original and that Baily worked for him. At some point in the 80's or 90's, Jacob modified his recipe to comply with USDA guidelines. Baily quit in disgust and opened up two doors down with the original recipe.
People are fiercely loyal to one or the other. I think they are both damn good, but I prefer Wayne Jacob's on River Road in LaPlace.