Next best price online £14.75 at Amazon http://www.amazon.co.uk/gp/aw/d.html/ref=redir_mdp_mobile/279-7669096-5770138?a=B002EWQVAU.
This is basically a net with a voucher to send off for live caterpillars at a cost of £3. You can do it online with PayPal. Asked for mine to be delivered in time for birthday in May.
Had loads in stock in Leeds.