Most good electrical wholesalers are now stocking the CABAC brand of Pelican "style" water /air/dust proof cases.
I took a look at these today and they range in price around the $70 to $80 +gst
Availiable with or without pick and pluck
The two sizes I looked at were..
465x360x170
575x420x210
I'm not sure what colours they come in, I only saw the black as pictured
May be more on thier website
www.cabac.com.au