Why not use drones?
I would guess the size of the drugs packages they have in mind would dwarf the capacity of anything but a proper Predator drone to carry.
As somebody else mentioned, the Land Rover has been going for about 70 years and was mainly made out of aluminium because Rover wanted more steel to produce their cars. Producing a vehicle for foreign markets was one way to get a bigger allowance of steel. They weren't that keen on selling Rovers abroad at the time, but producing an aluminium vehicle for sale abroad meant they could use the steel allowance on their Rovers...
Whereas what they probably should have done is looked at making more of their Rovers out of aluminium
Kleeneness is next to Godelness.