I had to kill sometime in Ballarat today (power cut for maintenance at home) so looking around I spotted Dimmeys.
(free parking in that square...)
There I found some ladies and gents UL (or at least Light...) down jackets somewhat like the type Aldi and Uniclo sell.
Not sure about size and fit but they are $30, some decent as well as some horrible colours , they come with a pretty small stuff sack.
I am guessing the weight to be around 250g or so, not sure...
Maybe worth a look if you have one of those stores around where you are.