LOL. My Karcher was a cheapy from Supercheap
Got an email from the local repair agent who seem quite happy to assist and sent me copies of the exploded diagrams to point out to the parts required and they are going to get back to me with some pricing.
I only need 3 oil seals and 2 nylon planetary gears, but the gears dont seem to be listed on any of the diagrams so will see how it goes!
If it does come good price wise, does anyone know how much oil should be in the gearbox? Mine had none left so nothing to go on there, and the exploded diagram just has a 1 litre bottle as spare parts and the gearbox wouldnt hold a litre! If I do fix it I think I might pull it apart and check the oil level (in the maintenance free gearbox...)