CT has a good variety of patterns and sizes, and nice 100% cotton fabric.
This deal says it is 'introductory' but i was able to order it having ordered other deals before. If the link doesn't work, google '135 shirts charles tyrwhitt' and it should pop up.
Slightly cheaper than the other deal on here currently @$59 per shirt delivered (if you are looking for more than one!)
https://www.ozbargain.com.au/node/863400
See my comment above re free return/exchanges.