Before you throw away the tailgate, you could try to bush fix it yourself:
1. Remove all hardware to not have any high points.
2. Lay a blanket and / cardboard on garage or driveway concrete floor.
3. Place the tailgate on the blanket / cardboard with the outside facing down. Tailgate forms an arch.
4. Do a number of hard bounces standing on the tailgate. If it does not move,
5. build a press: a 4x4 on top of the arching tailgate to distribute the pressure. A bottle jack or floor jack. on top of the 4x4 pressing up against the frame of the
Roxor.
Good luck.