[jsmith99]

The branded lenses are often expensive and therefore high margin, so most opticians will have them available, but few people order them so they are unlikely to mention their existence. As to which are best, you are best finding an independent local optician who seems to have an interest in the subject and asking for a recommendation. If you read the Optiboard forums you can get an idea of the passion some opticians have, although it's not useful for specifics.