"sole distributor" is a correct and usable phrase in written English.
It is typically used to refer to a person or entity that has exclusive rights to distribute a particular product or brand in a specific area or market. Example: XYZ Company is the sole distributor of ABC brand televisions in Southeast Asia.
Paramount Pictures will be the sole distributor and marketing partner for each film.
It is also the sole distributor of Smart line of small cars from Daimler.
The latter is now moving into manufacturing and will be the sole distributor of Mr. Pinch's voluptuous new Goddard sofa.
The company, based in Brea, Calif., is the sole distributor of Suzuki vehicles in the continental United States.
Julie Masow, a spokeswoman for Novartis, said Apotex ultimately purchased samples of Tasigna through the drug's sole distributor.
I.B.M.'s own ViaVoice hasn't been updated since 2003, and its sole distributor is, get this, Nuance.
Diageo, the wine and spirits company, is expected to announce today the first companies selected as sole distributors in individual states, the company said yesterday.
As for early British adopters – because this was before the time when you could buy a Lomo on Amazon – they'd have to track down its sole distributors to an obscure design studio in London's Clerkenwell, where friends of the Viennese students were selling them.
Western drug companies have shown themselves determined to defend their patent rights to be sole distributors throughout the world, and Dr. John Wecker, head of Boerhinger Ingelheim's efforts to negotiate cheaper prices in Africa, said he did not yet know what his company would do if Cipla undercut its prices.
Jamaica Public Service, the island's sole electricity distributor, last month signed purchase agreements with two wind farms and a solar-power scheme.
And while a nation wondered what Palin might say upon accepting the vice-presidential nomination, the people at Italee, which is the sole Kawasaki distributor in the United States, wondered whether she would wear her 704s.
