The Nortons have been retired for a few years now. I went to visit them 2 months ago to interview them for a project. Their violaceas have been distributed and now is selling through other vendors like Krull-Smith orchids and Main Show Orchids (Taiwan) and other smaller US vendors.
Big Leaf Orchids may have some. Sapphire Dragon Orchids (through the Orchid Vault sister site) has indigo type equalaceas and maybe some violaceas too.