My recommendation for wood floorboards. While not 32, I think these are the way to go. I used 9 ply1/2"Baltic birch (no voids), sealed on all sides, with gl*** sealing tape around the edges, and stainless seam support in the center.
I purchased a set from CW Moss last year. They are still listed at $289.95 They were a good fit. The adjustments that I had to make were minor and I attribute them to the flex of the frame and body over the last 93 years.