Try this one:
http://www.elitefitness.co.nz/exe-swissball.shtml
At the moment I am looking at what bench exercises I can do on my swiss ball. Eventually I would like to be competent enough on a SB to be able to replace an entire workout on a bench with one on a SB. Try your
bench presses, flyes, french presses, pullovers, etc. on your new SB. Works your core really well, gotta concentrate real hard on keeping your back straight when your upper back/shoulders are the only part of you actually resting on the ball.
I LOVE MY SWISS BALL!!!!