my 10c worth from other side of the pond ,  have to agree better buying a runner , they can be had cheap , esp if bought private  , like this one 
http://www.ebay.co.uk/itm/1995-LAND...0261125?pt=Automobiles_UK&hash=item43acb39d05
be aware when buying an auto they early ones were just mechanical injection, no different from in defender .  the later ones were  still mech inj but were edis , which had computer controlled timing etc , these were about 10bhp higher output , flyby wire accelerator pedal .   These later ones you need the alarm immobilizer unit and key fob to make operate , ie the computer wont work unless it gets the ok signal from the immob unit .  
    I recently fitted a 300tdi edc auto into a 90 for my daughter , its not that difficult  to sort the wiring and it had the bonus of having immobiliser when finished .
    The crossmember fits no probs from disco to 90 and the engine with auto box lines up same as with a V8 .  The rad is in same position as in disco, so engine oil cooller pipes are right length. It would be a good idea to get new rad at same time as  quite often the fins rot off in UK due winter salt , this quite often lleads to o/heating at speed on  motorway  having had no probs normal running around .  The 300 tdi auto are 1.2  :1  ratio and work OK in 90 with 285/75x16 tyres (just) as they are set up for discovery size tyre sizes.  1.4 box in a disco would be  bit low  with standard tyres .   the V8 autobox change point etc are wrong for a 200/300 tdi , so best get tdi autobox  HTSH 
I agree best way to ship would be chop down , i.e.  cut chassis  behind transfer box, roof off at bonnet(hood) level,  no hood ,doors,  front outerfenders, front axle.  That way you will get anything you possibly need .:wings: