If any heavy construction equipment distributor fails or refuses, upon cancellation, termination, or nonrenewal of a contract by either a retail dealer or the distributor, to make payment to the retail dealer as required by section 51-20.1-02, the distributor is liable in a civil action brought by the retail dealer for one hundred percent of the net cost of the unused, complete heavy construction equipment, plus transportation charges paid by the retail dealer, and eighty-five percent of the current net price of repair parts, plus five percent of that current net price for handling and loading plus freight charges on the repair parts which have been paid by the retail dealer. A distributor is liable for equivalent amounts in a civil action if the distributor refuses to supply heavy construction equipment, repair parts, or both, to a retail dealer who has a contract dated after June 30, 1981, or a contract with no expiration date which is continuing in force on July 1, 1981.