Can you buy a Dolby, or an Intel processor?
Well, yes you can. If you know the right specialist outlets.
But you don’t go out and buy what is basically a standard BtB component. You buy a computer, with “Intel inside”. Or you buy wonderful hifi, with Dolby. Both of these brands have succeeded in establishing themselves as a household name.
Then they sell this brand to BtB customers, who know they can sell more if they put “Intel inside” stickers on the PC. A clever strategy, that also makes Intel safer in the long term as a brand, and allows it to charge more than a no-name Chinese clone.