I suggest that you just get from authorized Apple resellers for your mac accessories. It would be hard and sort of a gamble if you get something locally made or even those which are branded because you do not know the quality of it. It might even cause problems that would surely prove to be very disappointing on your side. They are a bit more pricey but you are sure of what you get, on top of that, they are warranted so that should any problem arise, you can have it repaired/replaced.