It is still available in some of the budget games shelves in places like Game, HMV, Virgin etc. Also you can purchase it from http://www.amazon.co.uk, http://www.hmv.co.uk and http://www.virginmegastore.co.uk, and quite a few others! I haven't found anywhere where you can just download it, I think you can only get the boxed CD version. I was amazed that I managed to find it in PC World as a box set which included locomotion and rollercoaster tycoon 2. It was £9.97.