Heilemann said:

"We used some stravisky, the flipside of The Rite of Spring," Hirsch remembers. "George said nobody ever uses that side of the record, so we used it for Threepio walking around in the desert. The Jawa music was from the same Stravinsky piece. We used music from Ivanhoe by Rózsa for the main title. George was talking about having a majority of the film set to music."

Is he referring to Chez Le Maure? That sounds the closest to me.

I think if you stuck Rózsa's "Prelude in a blender with that "King's Row" piece, you'd have the Main Title for Star Wars.