You can purchase Lost planet 2 with Slip cover from HMV, however the game will not be sealed. Instead you have to purchased a sealed copy from another store.
http://hmv.com/hmvweb/displayProduct...;-1&sku=256621
I got a mint Slip cover from someone on AVforums for £10 with a used copy of the game.
I got Assassin creed 2 Black edition when Play.com had it back in stock a while back for £69.99. Surprised it turned up mint.