HI Amar,
What a bummer to hear about this. As you say, not fair considering you only just had the box done.
I know what it feels like to have the engine go...as does mike i'm sure. In the case of my old 3.7QS, it hadn't had the box done yet and the risk was too great to get it repaired at £3k+ but your is truly a unique beast and you've spent so much time and effort getting it to spec, it seems almost cruel not to be able to enjoy her for a bit longer.
I hope it works out ok for you and that you're back on the road soon - i've always loved that green and still have never seen another to date so hope it doesn't have to be sent to S8 heaven!
Good luck!
Oli