Well, if the tower only costs £45.00, then it possible to build one like this for less than the price here. All there is to it is the pc keyboard adaptor, Blizzard 1240,the 40 GB hdd and the IDE-fix. I wouldn't count on original software, so that worth nothing.
With a little luck on eBay, you could get a Blizzard 1260 for 100 EUR, and then just build it your self... That way you also get what you want :-)