The commercial Sea&Sea and similar fiber optic cables are fragile and way over priced.
One can make one's own cables with Toslink optical fiberoptic cable and Howshot or Inon ends.
The ends are sold by Divervision in Taiwan and the cable is sold by eBay:
http://www.divervision.com/howshot-dual-fiber-adapter-for-seasea-ys-strobes-fa-ss2.html
https://www.ebay.com/itm/Optical-Fiber-Optic-Toslink-Digital-Audio-Cable-3ft-6ft-12ft-25ft-50ft-gold-Lot/111191542789?hash=item19e3884c05:m:mzcULKIoUryYyITUJDuE57Q
The cable can be straightened or coiled by heating it in boiling water for two or so minutes, then straightening it. It can be coiled by first wrapping it around a rod and holding it with transparent tape or masking tape, then boiling it for a two or three minutes.
With 4 mm od Toslink cable I made my own strobe cables several years ago and have had no problems. The claims that one needs specially matched cable or braided cable are hogwash and superstition, made up.to justify extortionate, vastly inflated prices.
All the cable does is transmit one or several pulses of light of determined duration, and the Toslink cable is designed specifically to transmit the complex light signals of hi fi music. It does an excellent job of carrying the light signal from the camera to the strobe. Plus one saves a bundle of money and has a much tougher, reliable cable.