Not advertised as a ballast resistor, but something like
THIS would do the job and look nice if you had a green truck.
If you want a higher current capacity, use two resistors wired in parallel, with twice the resistance value of a single one- - - - -for instance to get 200 watts power handling capacity and 2 ohms of total resistance, wire two 100 watt/4 ohm resistors in parallel. Ohm's stuff is a law, not a suggestion!
Jerry