Regarding the Samsung drives Narmi uses, this eBay seller has them:
http://stores.ebay.com.au/PTMe-Clearance
They currently have 6 used ones for $2.99 each and 2 new ones for $6.99 each in stock.
Postage within Australia is $7 plus only $1 each per extra drive...so I bought 3 of them and got half off the postage cost
A good source for those that don't have a recycling centre nearby that lets you rummage
PZ.