I've never heard of a duck enchilada, eithr. Personally, I've never understood the attraction to duck at all... it's way too greasy no matter how it's cooked (hence, the invention of duck a l'orange in the futile hope that the citric acid of the oranges will cut the grease a little).
If I ever get a craving for duck, I think I'll just have a nice bowl of piping hot bacon fat - tastier and cheaper.