I use a place in Colorado called Grande Natural Meats, website ElkUSA.com
They have some great stuff, elk, bison, venison, goat, but I'm not sure if they ship to your part of the world. They might.
I got some kangaroo at an Aussie site (let's see if I can find that again)
here it is : http://www.marxfoods.com/products/Kangaroo