The really cool thing about that Land Rover with the tracks is that it was actually a factory authorized conversion, meaning the vehicle would still have been under warranty. It was known as the Cuthbertson Land Rover, since the conversion work was done by Cuthbertson and Sons in Scotland.
I believe the vehicle could be converted back to a "normal" Land Rover, with just a hoist, and half-day in the shop wrenching.
Last I heard, there were only about a dozen of those guys known to still be in existence, so if you got to see that one in person, consider yourself lucky.