Jimi, I've seen O. fragrans in many nurseries here in the LA area and I have one growing in my yard but I've never seen any cultivar names attached to them. Maybe San Gabriel Nursery could help you, they have a large asian clientele.

Hi kentc, thanks for your info, will definitely check out San Gabriel Nursery. These varieties are from China, I've read here gardeners from other states had luck importing them from China, not sure if I they have propagated to CA.