As stated in the title, just got back from Costco Docklands and picked up a few Tommy Hilfiger - T shirts at $15 each.
These are not the slim fit. Sign mention something about them being a flag style.
I'm usually a Large with local shirts but i bought a medium. (Probably American sizes)
There are also Nautica T shirts at $20 and Tommy Hilfiger Button Shirts at $44.
Not sure when it will end, probably when the stock is gone.
Confirmed at Docklands not sure about other sites.
Update 20 Nov 2014: User confirms that Adelaide Costco on Churchill Rd has stock
I can confirm there is T-shirts at Ringwood