Are you looking for a monologue for yourself to read or act out? Or are you just curious. It is hard to say with out going through the whole movies to find them, but I believe Alice in Wonderland has a couple. Come to think of it, they might all have some, but i don't know if they are as long as you are looking for. Do you count the songs as monologues? Because sometimes a character will go from speaking to singing, back to speaking. If you just spoke the whole thing, that might be a monologue. Just a thought .
I just had to do that, in my theatre class. Go to : http://www.whysanity.net/monos/monos1a.html
they have a bunch of monologues including some disney ones.
Good Luck! Hope this helps.