I know some brands which use Asina parts, like speakers in cabs/amps and pickups in basses. So like a 'Made in Britain' amp or a 'made in Germany bass' with foreign parts. Even some high end brands, but the two I know don't like to tell that. But those pickups are specially made for those brands and in no way cheap or bad or whatever. So it might be a manufacturer like Artec, but it could be to the reverse engineered specs of Epiphone.