I've been asked the occasional question as to where to buy inexpensive conventional pet wormers in multiple-dose quantities without a prescription, aside from the dilute-the-farm-animal-product approach. After snooping around for awhile, I found this Greece-based eBay seller to whom cat and dog rescue groups appear to give good marks:
http://cgi3.ebay.com/ws/eBayISAPI.dll?V ... mirmidonas
For those who use conventional wormers or who prefer to donate products, rather than money, to shelters or rescue groups, this appears to be a good place to look. If that link doesn't work, a search on eBay for the words "Felidon" or "cat wormer" should be a start in the right direction. There also are Australian wormer suppliers on eBay, but I don't happen to know much about them. An eBay search for the term "Allwormer" should lead to their sale pages. If I recall correctly, the Australian endoparasite spectrum is fairly broad, so it always is a good idea to review the products' targeted pests.