if you are ever down in salinas, Pet Fun is a pretty good one. they model their store after large chain stores, but they are privately owned. like most LPS, they will special order anything you want.
they usually have some pretty good deals on plants. i got several bunches of ludwigia glandulosa and rotala magenta from them for less than 2 dollars a bunch. i know its a bit of a drive, but its a pretty nice place.
if you ever go there and buy a tank and fish on the same day, be sure to tell them that you have other tanks the fish will go into. they wont sell you fish if you intend to put them in an uncycled tank.