No idea about the cable, but i would be willing to replace a new cable. And make sure to periodically lube it.
You're not the first to lose that pair of bolt and washer. A few cases were reported in my country too, but their bikes are already out of the warranty cover period.
Current : Maroon 2011.
- Fender Extender - Radiator Guard - 19mm Nissin radial master - Nissin 4-pot caliper - SS brake lines - Osram Hyper 65W both low/high beam - LED 30w aux floodlights & 3w DRLs - Rear Hugger - Givi crash guards - Yoshimura TRC Carbon - Dynojet PC5 - Scottoiler - R1 shock with Ohlins 14.2 kg/mm spring - Imitation Givi Windshield - Rear Givi rack with 24ltr Givi top box - Bosch dual tones - Z800 stock mirrors.
Up next :
- Protaper SE ATV Low - PIAA Platinum low