I think most folks that have a *good* recipe will keep them closely guarded. Todrod had one on YouTube under the same name he used here.
Some I’ve been wanting to try but can’t personally vouch for yet.
https://www.saveur.com/article/Recipes/Boudin
http://www.realcajunrecipes.com/recipe/classic-boudoin-boudin/
http://www.cajun-food-specialties.com/cajun-sausage.html then click on boudin recipe
If you try any of the let me know how it comes out.