Hi all,
I have this exact issue with my ISF(2009), luckily I took the warranty out on it when I bought the car. It's been with the garage since the beginning of June and with the Covid issues it has taken a long time for the warranty company to come out and inspect the car. The work has finally been authorised (circa £18k) but have been told that there a no gearboxes available and that my gearbox is being sent off to be overhauled. Does this sound reasonable? I find it hard to believe that the part is unavailable. Apparently the dealer has checked the system and there are none available in Europe or Japan as they no longer make this part.