A, remove your poscode from location, stick it down as nearest town etc
B. the 2.7 is a bit of a minefield when it comes to rebuilds, general opinion is do not bother and buy an old Jag and use the engine from that, its cheaper plus you can test drive it.
Pretty much any company that says they can rebuild yours is not telling you the whole truth, if you find someone/company who says they can, google them to death, most people go on price alone, and predictably they end up dissapointed/ripped off or with an engine that will fail again very soon.
Plus as the newest 2.7 is 10 years old it might not be financially viable.
If the engine has just plain worn out (unlikely) you may get lucky, but if it has died for any mechanical reason dont go there.
Well worth joing the Disco3.co.uk forum, wealth of info on there