I bought 16 from my local Bunnings outlet and they had new stock in (about 20 more) within a week, seems to be no shortage of supply. Maybe you need to ask a Bunnnings to order them in if they are not stocked items?
The video does not show the colours well, they are super intense, the poor video camera just can't handle it... sorry, I will have to try again to get a better video.
I am very happy with the result, 725 pixels and is 1.65mtr across.