How to downgrade to itunes 10

I absolutely hate the new look, and I want to downgrade Itunes to an older version - preferably back to when hitting the escape key while in Column Browser would take me back to the top of the column (maybe 9.x? it seems like it's been a while...) Any ideas? I thought I had an old version on my external, but no luck. Really don't like the new look.

Thanks,

Greg