I have had good luck ordering plants from specialty companies; one of my favorites is Brown's Ferry Gardens in SC, they specialize in daylilies and their plants always arrive in great shape. These companies will ship the plants when they are dormant, so they can withstand a few days in transit when the weather is not too cold or too hot. I'm sure that there must be good companies on the West coast, ask around among your gardening friends.
However I learned early on not to bother with those giant plant companies that advertise huge varieties of amazing plants at hard-to-resist prices. Too many disappointments and dead plants.