I'm in the middle of the same project but looking to go in a different direction, specifically
not wanting to put anything back there. I like the clean look like
@JMT's above but with the stock gate.
Problem is I have to have a third brake light to pass inspection otherwise I'd just nuke the whole thing. The only thing I can find online is the license plate relocation bracket with integrated brake light which I don't like, I'd rather have the blank tailgate with just the brake light but can't find anything that mounts to the existing tire carrier holes. If you come across anything like that in your travels please let me know.