"This vehicle is ending production because the Indian company that owns Land Rover don't want to invest any more money in updating it. I'd imagine that they're also not very keen on the amount of hand-building that goes on to make it - I doubt it's very profitable for them."
I'm actually surprised that Tata haven't thought about moving production to India.
A lot of the problems of profitability would go away if it was built based on Indian labour rates, and the Defender brand is probably less sensitive than Range Rover to being made overseas (FFS, they make Evoques on Merseyside). They may also find that a reduced price will then improve volumes, with more sales to developing countries where the emissions regulations are less stringent.
And if they can keep production going then they can look at other possibilities in the power-train; electric Landie anyone?