Nothing to do with me, but I saw these on eBay and thought I'd pass the info on in case someone else can make use of it.
It's all in Italian, so you'll have to endure the garbled Babelfish translations and take a risk, but the prices seem good, although his feedback is low.
http://cgi.ebay.co.uk/ws/eBayISAPI.d...keTra ck=true He's also got a carbon tank for sale for IIRC 400 Euros.
I know it should be in "market place" but IIRC some of the auctions are ending very soon.