Well, I guess I'm a bit of a purist....jalapenos came from Tex-Mex. Cajuns and Creoles use Tabasco. You can buy real Cajun sausage from Savoie's (they have a website and ship overnight packed in dry ice). We buy sausage once a year and freeze it.
My wife and I are both from S. Louisiana but now reside in Washington (state).
Another excellent source of almost anything "Louisiana" food-wise......CajunGrocer.com.