Unfortunately, very few Xbox emulators exist, and the ones that do can only play Halo and Turok. You're only hope in playing MO again is to borrow or buy a new Xbox
I'm afraid Fuzzle Guy is right and there is very few X-box's left although you could buy a 360 and play it on that. Some issues with sound but that's only what I've heard.
You better buying the real game instead of emulator. I find playing oddworld games is best played on the real console. Although i have AO and AE on PC. I am still looking for them in PS. As for MO, I am glad I have it and I think you should dish out some cash and buy the stinkng game. :L no offence, someone suggested ebay. Go for that. I live in HK and its not that bad. You can get consoles really cheap and authentic. Buying them on ebay is just them trying to make money.