Hi Cazzer,
There were 2 series made with a total of 31 episodes. I am pleased to inform you all episodes are currently available in Australia on dvd in 2 boxed sets of 5 dvds each and if you do a google search you will find prices are for about $82.45AUS to $100AUS per boxed set plus postage costs, so shop around. The cheapest price quoted above was found at devoteddvd.com.au and their postage rates are very cheap too