Okay this might be a bit left field but you never know what knowledge is out there

I have a cycling tour coming up, about two months or so of tootling along from Darwin to Perth, leaving around July. Given that this will, even at that time of the year, be pretty warm weather for a fair bit of the ride and sun protection is also important I am looking for suitable shirts to wear.
Such beasts will ideally be loose fitting, summer weight, smell resistance (can be two weeks between washes and only a couple of shirts to be worn between washes) and a reasonable degree of UV protection. Am I asking too much? In the cycling world the likes of Ground Effect, a New Zealand company do a shirts such as the ZZ Top or the Rock Lobster but I am wondering if there are similar products in the bushwalking market place. They don't have to be technical tees or have rear pockets either.

I would appreciate any suggestions.
Thanks
Andrew