Why not get a 5, 15, 20kg eco litter bag from animal attraction.
http://www.animalattraction.com.au/...44d06eec83d2c8cb&option=com_phpshop&Itemid=29
An environmentally friendly, multipurpose pet litter manufactured from 100% natural Australian pine and hardwood plantation timber waste compressed into pellets. Eco-Litter is an excellent alternative to traditional clay based litters. The ultra absorbent, clean, easy to use pellets are economical and safe to use with all types of reptiles.
The natural wood oils and resins in Eco-Litter are anti-microbial, inhibiting odour causing bacteria, keeping enclosures smelling fresh and clean.
Absorbency is very important for the life of the litter as well as odour control. One kilogram of Eco-Litter will rapidly absorb approximately 4 litres of odour causing liquids trapping moisture and odours before they can spread.
Eco-Litter is a 100% biodegradable all natural product. It decomposes quickly and may be composted into flower gardens or flushed in small amounts (check local council regulations). Used litters should not be placed in gardens producing food for human consumption.
Eco-Litter is a superb natural surface for all manner of reptiles. Its high waste and odour absorbency makes it a superior substrate for snakes, lizards, spiders, etc. Eco-Litter will not produce dust, which can block and inflame sensitive breathing and sensing organs.