(There's a limit to how many mobs are active at one time, and wool doesn't re-grow once removed, so get a pack of wolves and a bow and arrows and go hunting.)
Too late, I'm home now. I did collect... uh, 4 buckets of water, plus sugar, plus red flowers, but can't build much out of moulded plastic and 12 litres of Coke. :(
That stuff is probably the rarest material in the game.
Are you planning to make the maze higher, so it actually works as a maze from the inside? And if so, are you planning to make alllll of it from moss stone?