That is great!
Sadly, I don't think even the 4'x2' sheet is big enough. IIRC the width needed was about 26.5". I know this because I bought a quarter sheet of ply when I was re-making mine and it was too narrow. Maybe my boat is strange?
You could do it with two or make some spacers or something.
Good find, still love that place.
94 Prostar 190, LT-1, Powerslot