PlantLocks internationally

We get a lot of requests for PlantLocks from the U.S, Australia and elsewhere in Europe.
At 25kgs each (unfilled obviously) they're expensive to freight internationally singly or for small no.s.

We've just dispatched 30 to Velo Cycles – a cafe and bikeshop in Melbourne, Australia. But as intrinsically heavy products, the ideal would be to establish local production...