Well gee, if you put it that way, then I'd have to answer "none".
Do you believe that the sole purpose of the Commerce Clause, as defined by Madison in his letter to Cabell, is to encourage manufacture?
Well, there you have it. Straight from Madison's mouth, compliments of tacticalogic.
"Without exception" seems to be a rather exclusive term. The Founders were somewhat prolific writers, do you have a reference from Madison, or any of the rest that would indicate it is not?