Just looked on the website you posted - sounds good. What's the postage like? They have bulk Organic Cacao Nibs which are super good for you (more antioxidants, etc) and you can process that up finer in TMX. I have also found we go through alot of cocoa now since Thermie came to our home. Our use of sugar too!! I have started to halve the amount of sugar in all the recipes but at least we aren't getting it in all the packet and bottled foods we used to have.
All of our Coles & Woolworths up here sell Cadbury Cocoa powder in boxes but you have to look for it with the drinks like Milo & stuff.
What do you use the cacao for?