Thanks to Triton Print. I cannot claim this as mine at all. I merely split the model in Tinkercad and extended the headrest hook to accommodate thicker seats. I recommend PETG or ABS with 100% infill.
The author remixed this model.
The space between the headrest and back of the seat in my Tundra was longer than the original print. This print added length so the bag hooks hang properly on thicker seats.