We found 5 Reddit comments about Walt Disney and the 1964 World's Fair. Here are the top ones, ranked by their Reddit score.
You need to listen to one of the disks on Disney's audio from the 1964 World's Fair. It includes drafts of that script as well.
Martins Videos did a good background of it as well with some interesting facts.
quick google search found this
There is a Walt Disney and the 1964 World's Fair Box Set on amazon. Not the same one you were looking for?
edit: there are also a couple/few on ebay of the same box set.
Just curious do you mean this boxset? I've been thinking about picking it up for awhile now.