ORA sells only wholesale, so check with your LFS in your area. Many can/do order from ORA.
As far as their dwarfs, yes they claim they are eating frozen food. From the information I have, they also stop eating frozen in time and require live foods.
I know of nobody (and I've kept them for 4 years) who has dwarfs that eat frozen foods long-term. They may eat it on occassion or for a few weeks, then stop for no apparent reason.
Be prepared for the daily hatching and 2-3 times a day feeding of live foods if you consider dwarfs.
Tom