I wish you the best of luck. JD Jones, owner of SSK and developer of the Whisper cartridges has a proprietary deal with ALL of the major die makers, he must authorize the production of every set sold, is what he told me, and since the law changes in the US regarding anything deemed military use, he is not allowed to offer anything, to us terrorist harboring countyfolk.
Unless you find some that are already in country , you make be pooched