It was through the main website:
www.greencone.co.uk I think. Just google green cone UK and you'll find it. You needto ring thrmto place the order but they stock the entire range of greencone products.
Can I ask you how long you have your cone and how you're finding it? Ours is quite full since we've had such a cold winter/spring. We only got it march 2009 so this is our first winter. I'm hoping lots of powder will help spur it on. Where have you been buying your powder?