Samps,
I'm another Aussie, but I can't help you with a pending need to buy lots of fanless client systems. Instead I recommend against having to ship in a bunch of machines from the States - as good a job as they are doing over there :-) we need to support local suppliers.
The harder path is to "let your fingers do the walking" in the Yellow Pages(tm) and source from any of the industrial computer suppliers in your State
Gavin
in
Western Australia
cheers Samps