28/29 open cab aa wood

[jtw]

Does anyone have an original 28/29 open cab wood strip that goes on the cab back, the bottom of the soft top is nailed to it? What I want to know is it made in three pieces and joined at the corners? Also what is its size? The new ones I have seen are all different sizes and one piece. I have a pretty good 28 service truck and am trying to keep it original.