Lugworms are mud-burrowing marine worms that are fatter at the head and tappering toward the tail. Perch and corbina will take them. I have heard of them being used from Malibu south. You should check all bait shops in the Ventura and Santa Barbara areas (for example, Erik's, Harbor Tackle, Hook, Line, and Sinker), but I do not recall seeing them. There are plenty of good alternative baits, one being the Big Hammer 1 3/4" grub, available at many shops in the area.

Bob