I bought it from McLeod road market. the name of the shop is Fida Autos, it's almost opposite to the suzuki showroom there. cell no. 03214778881.
as far as genuineness is concerned, it doesn't look fake, it came with the original box, dust cover and instructions manual. and the quality of materials and craftsmanship is really good. and it also have a holographic sticker on it which is very similar the one on my other helmet which was brought by a friend from England.
but this shop is not an authorized dealer, so you can't be 100% sure