Cajun Crafted Accordions by Tim Reed Tim is a new builder on the scene.
Bon Cajun Instruments Here's a builder of Cajun style one-row accordions who also imports Dino Baffetti accordions in his small-town Louisiana shop.
Cajun Accordion Builders A nice group of web sites here.
Junior Martin A Cajun accordion builder.
Savoy Music Center This is the home of Mark Savoy who builds the Acadian Accordion in his shop at Eunice, Louisiana. He also sells Hohner accordions. I bought my first instrument, a one-row Hohner, from him. There's also a lot of material on Cajun culture. He's a talented performer and has many recordings of his music.