It is not so much that you can't get them Deejay, but you can no longer get them more or less on the nearest street-corner, and they are now over $3 each instead of under $1. Another problem is that no one seems to sell the larger diameter stones you use for jointing. The sharpeners are sold under various brands at various prices, but they all look much the same:
http://cgi.ebay.com.au/chainsaw-cha...ihl-/200554529462?pt=LH_DefaultDomain_15