Hey there,
I found this great caresheet on it: http://www.venomlist.com/forums/index.php?showtopic=18092
The author suggested substrate made of 50/50 peat and soil mix.
The tank for one can be a 5 gallon but if you want something larger, go for 10.
Food can be crickets, meal worms, or roaches.
I have no idea where you'd buy it haha
Maybe you can ask this guy if he has any: http://www.thedailylink.com/thespiralburrow/index.html
Found this aussie scorp selling site: http://www.thegreenscorpion.com.au/shopshow.toy?catnid=44093