Land Rover Repair: Engine Blew 2003 LR Discovery HSE

Question
Vehicle not driven on a daily basis has 77K miles. Last serviced August 2013. oil light came on last week. Immediately pulled over towed to the same dealership. Was told the oil pressure went down and blew the engine. The kicker is they can't get a factory engine. They are hoping I'll go away. I won't. What's the purpose of regular service if you still have something like this happen. AAA driver said the oil was a quart low but still in safety zone, no leaking oil, did not run hot. I asked what the faults showed and they said it doesn't work with the engine, it has to be taken apart. Why don't they have an engine? What happened at my last servicing? Did they check the faults and address them? I am not buying this. I am doing research now and the only recall that shows up is the problem with the throttle body which I did experience and could have been KILLED. There were six total recalls and I was not notified for any. Same address 12 years. What do you think?

Answer
Oil pump failure is a possible cause of engine failure.  We have seen several.  The engine should be repairable.

Employee turnover is high in dealerships.  The one that looked at your car may not have people who have experience on the 2003 vehicles.  That's a big problem in the industry.  You're welcome to send it here.  I believe I addressed the rest of this in my answer to your follow on question.