Maybe it's here under another name. Or there is a lookalike variety available domestically that could be planted instead--unless there is something else about it you are after besides its appearance. With a long name like that it could be in circulation here under a contracted version, as well. For example, in practice hybrid rhododendron 'The Honourable Jean Marie de Montague' tends to be called 'Jean Marie de Montague' or even just 'Jean Marie'.

Have you contacted Nuccio's Nursery in Altadena, Calif? They don't have a website but you can find their phone number on the internet. They seem to carry every camellia available.

I bought camellia seeds from a place named camforrest.com. Good place, has grown plants aswell.