Disklavier

I am a bass player by nature....  I have accomplished my objective of 
having a player piano to play along with (this is evidenced by my 
novice questions throughout this group).  Does anyone know of a source 
to purchase Steely Dan piano solo - midi?  From what I can find on the 
internet (free of course) is pretty bad.  I've even attempted to fix 
some of these using my Sonar software.  I've come to the conclusion 
that I would pay for songs, nearly optimized for the disklavier.

Any suggestions would be appreciated....

Geoff