Stanford plays at Cal on Sunday March 4th at 6pm. At a recent "Behind the Bench," Eileen Roche said there would be a booster bus, but that there were no plans for buying a block of tickets for fans.
It is possible to order Haas Pavilion tickets online from the Cal online boxoffice...
However! — as two recent buyers have found, the best seats the online sales form can offer are in sections 4 and higher. Section 1 is behind the visitor bench. Section 17 is directly across from it. (And anyone who's gone to one of these games remembers that the Haas ushers are quite strict about where you sit.)
If you call the Cal ticket office directly at (800) GO BEARS (800-462-3277) you can ask for reserved-seat tickets in section 1, 2, or 17—and at least as of today, you can get them.