Service Manual/Book For 2007 Holden Astra AH Twin Top


Morning all, I'm in Australia and have a 2007 Holden Astra AH TwinTop Convertible. I suspect the timing chain has slipped and now have bent valves so will need to strip down the engine.

Does anyone know where I can buy a service manual for this? I've looked at lot of Holden, Astra, Opel manuals and can seem the find the exact match for the car and engine?