If you google the name of the plant, nursery alot of possiblilities come up, just shop for the best price. Plants Delight had it but are sold out. You can check with other bulb suppliers like Brent & Beckys, McClure & Zimmerman, Gurneys, etc.

Too bad you can come to SoCal - they are sold just about everywhere nurseries to Home Depot to Wallmart (and although common, still very lovely).