Oh and by the way, ALL blurays movies are always on Disc 1 ... If you see a movie in my list that's listed as containing 2 discs, the second disc contains only special features .. This is the case for ALL blurays released till now, except one, which I will have in my hands soon inshAllah ..
So my point is, you don't have to specifically look for only 1 Disc blurays ... You can also just get the first disc of a multiple disc set as, which many customers are doing to save money, etc ..