you can still get one ply oak, I found 3 places that have it. up until around 8/10 years ago I could get 2 ply oak 80 x 42 , one piece face sheet. It was a pain because I had to peel the edge down to one ply and recess the center to accept for the two ply. Those were $6 a sheet, what those where made for was Door skins
keep in mind using these cabinet is replacing the entire top as a unit, not small areas of veneer, This would be those that the core is rotten or just don't have anything at all.
as you know apples out here are free, where oranges go for big $$$ lolol
my cabinet will go back to what it is, the 15-91 goes back in it.