Photo by Sanchez and KitaharaShould you swing by San Francisco art gallery Fifty 24SF on the evening of December 4, you might leave with a new print for your wall and a new Aesop Rock song firmly lodged in your head.According to a MySpace blog post, the MC has contributed a tune called "Tomorrow Morning" to Bay Area artist Jeremy Fish's "Ghosts of the Barbary Coast" exhibit, which opens December 4. The Aesop-produced tune, which features chorus vocals from El-P and scratches by DJ Big Wiz, will play on repeat throughout the evening. And if you like what you hear, you can pick up a limited edition Jeremy Fish print on a small wooden plank that comes with a USB drive containing the song, lyrics, a digital show catalog, and possibly some other stuff. Once the print's all gone, Aesop expects the tune to hit the Def Jux website for your downloading pleasure.