Some 4GB Ultra II available for £13.99 from play.com ...
http://www.play.com/Electronics/Ele...II-CompactFlash/Product.html?searchtype=genre
Extreme III are £16.99 ...
http://www.play.com/Electronics/Ele...isk-Extreme-III-4GB-CompactFlash/Product.html
Always find they are the cheapest (or there abouts), plus they have free delivery.
Funny looking SD cards