Carrying a bike on the back of a 4x4

[Quark]

Later this year I'm off with three friends across Asia with two R1200GSs and a Toyota Landcruiser.

In the *highly unlikely* event of a catastrophic failure on one of the plastic bikes which requires the attention of a BMW mechanic and his magic computer (for example the tail light) we'd like to be able to mount the bike on the back of the 4x4 to carry it to safety.

Is there a contraption one can mount to the back of a landcruiser that you can put large broken bike on? I was thinking of something similar to the spectacles they lower to put the front wheels of your car into to tow it, but maybe there's a more realistic suggestion?

steve