I spotted something on eBay I haven't seen before. So in Australia there's this little company called Agmer which makes work wear.
It looks like they've tried their hand making a rip-off of Swanndri (waterproofed wool clothing) called "dinkum dri."
Their shirt is 90% wool 10% polyester instead of Swanndri's 100% wool but I just copped one for about $32 USD when a Swanndri would be about $99 USD.
http://www.ebay.com.au/cln/stevensonsworkwear/Mens-bush-shirts-and-jackets-100-AUSTRALIAN-MADE/370343111011