http://www.ardentpets.co.uk/small-an.../prod_453.html
This is what I meant!!
I don't have one - they were in the shop that I got my hamster - sorry, I didn't make that clear.
Maybe your friend could order them from that website for you?
If you email them, they would probably ship to you, as it says on the "Postage Rates" page that UK and
international rates are rising which I think implies they ship outside UK but I'm afraid I don't know how much that'd be.
If your friend lives near a shop called Pets at Home (this is the major pet chain shop in UK) she may be willing to pop in and get one for you. This is where I saw them for sale.
Also, only UK websites come up when I google so maybe you could try as you might find a stockist near you.
Good Luck!