They didn't need all the top players, just a 3-point shooter.
Brent Barry (45.2% from downtown last season) would've done the job. Though the Spurs would have been looking at having a third tired player in addition to Ginobili and Duncan.
Allen Houston, Mike Finley, or even Reggie Miller would've broken the zone too. Instead, their best shooters were Shawn Marion (34%) and Stephon Marbury (31.8%).