Hey Disco girl, when are we going to disco. Just kidding.
very nice ID.
About your requirement, knowing Dubai about 10 years your chances are very minimal in renting such specialize car but again there are chances as you need for 2 years commitment.
Idea 1:
Write a mail and copy to all te following rent a car company, i hope some might assist you as an exception as none them would have this in there fleet. But when you need for 2 good years they might get attracted.
Hertz, Budget rent a car, Dimaonlease, Sixt, fastuae, discount rent a car, thrity, avis, dollar.
Idea 2:
Write same mail to Al Tayer or Al tayer rent a car division (if it exists). Al tayer is the sole dealer of Land Rover in UAE.
Idea 3:
Drive any rent a car for 1 month and then buy LR3 on bank loan, and when you leave you can sell it. It's depreciation will cost you MUCH LESS than monthly rental.