I know alot of topic about rope but all the post tell me to go magic shop to buy.
Also i am going to buy Fibre Optics DVD do Fibre Optics DVD got give free rope? <_<

Get Fibre Optics EXTENDED, it covers the original DVD and more. Go to Ning's Website and purchase your ropes and magic supplies. 101% reliable and several methods for payment. Search for 'Rope' and check out the different ones and the prices.

Why would Fibre Optics DVD include free ropes? The ropes are not gimmicked, you can get them easily.

The advise of going magic shop to purchase ropes is for a reason. You can buy ropes anywhere, but the diameter of the ropes and kind of rope are mostly not suitable as ropes that you would use for Fibre Optics. You will be hard pressed to find any place selling the right type of rope.

MagicalLobo's suggestion is a good idea since i've seen Uday Ropes on Magic Boutique site, which may be what you're looking for, though i would highly recommend Camirand Ropes which may be a little more expensive. That being said, try Spotlight if you really insist on getting ropes from non-magic sources.