@Tertle
If dead set ( no pun intended) on using 1950's Military surplus gear, I suggest you ask a question of this AMAZON seller. https://tinyurl.com/rzvxemu He delivers to NZ.
From the point of effectiveness and also a lot cheaper, I suggest that you follow this link... https://tinyurl.com/tc32zc2 and have a conversation with the supplier. CONTACT 0800 22 87 23
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