Finding? I believe that quotation was presented to you on a platter in post #93.
"Yet it is very certain that it grew out of the abuse of the power by the importing States in taxing the non-importing"
Yes, the origin of the interstate Commerce Clause, why it came about, was to stop this kind of abuse
"and was intended as a negative and preventive provision against injustice among the States themselves, rather than as a power to be used for the positive purposes of the General Government.
Within the interstate Commerce Clause is the provision for the states themselves to negate and prevent injustice. This provision was given a name by Chief Justice Marshall -- the Dormant (or Negative) Commerce Clause.
It was envisioned by Madison that the states would work out their commerce differences by using this provision, rather than waiting for Congress to pass legislation to correct it. Chief Justice John Marshall affirmed this in his ruling in Willson v. Blackbird Creek Marsh Co., 2 Pet. 245 (1829):
"We do not think that the act empowering the Black Bird Creek Marsh Company to place a dam across the creek, can, under all the circumstances of the case, be considered as repugnant to the power to regulate commerce in its dormant state, or as being in conflict with any law passed on the subject."