Described in title seen in the Ipswich Game Store. It can be found for £4.99 online but seems to be out of stock. If you own RB2 then this is a great deal - as buying the game new means you get an export code, which can massively bump up your RB2 song list if you buy the export key from the store.
This couldn't be found for less than about £14 a few weeks ago
Hope this helps!