There ya go!Good news, I have been able to make contact with an Australian company who manufactures zeolite.
They have directed me to a South Australian contact who will (hopefully) organise a couple of bags at a not too bad price.
Thank you for your detailed and informative discussions.
Regards Sir Broderick
Was going to suggest that you look for the mineral name zeolite instead of the brand name PDZ.
DE desiccates, and can cut, insects bodies, killing them...and can 'dry' other thing up as well, but once it's damp or wet is worthless.
It's used as a feed additive to kill any insects that might be harboring in the grain/feed.
Zeolite actually absorbs ammonia and moisture, is much less dusty (if you get the granular kind) thus is much more efficient to use on a poop board.