Need some help making / find some backing tracks

[JACK250]

Hi all, I have my year 12 exams coming up, and am trying to work out backing tracks for three pieces. I'm having a hard time finding backing tracks without bass, and was wondering if anybody would be able to help me remove the bass from the original recordings, while retaining a high sound quality? The songs are Michelle - The Beatles, I Heard It Through The Grapevine - Gladys Knight and The Pips and For Once In My Life - Stevie Wonder.

Thanks in advance! Jack