The only site I know of is the one I set up with Jon:

http://www.pianotricks.com

The only "equivalent" thing to tab is musical notation. In fact it's the only efficient way to describe in visual/graphic form what notes to play on a piano/keyboard. The piano only has one possible key/note/position associated with every unique note on the musical staff. Much easier than the guitar with it's many possible fingerings & note locations!

You might have difficulty finding the music to those pieces without buying the scores to them. They are both copyright protected. One way around that would be to take private lessons and have a teacher learn them "by ear" and then show you how to play them. Or if the teacher has the scores, then your learning of them is somewhat ethically/legally protected by "fair use of private scholarship or study".

But in my experience any teacher worth taking lessons from will require you to buy the score anyway.

Good luck learning!