http://www.chuckthetruck.com/page30.html#tailgate

Still driving it daily, and the made in China tailgate was rotting more than any of patches. We could have bought a new, good one, but we had a couple slabs of Osage Orange, a naturally rot-resistant wood, that we could make into a new tailgate. Never found any plans or photos of such, so we ciphered it out and started cutting.