Is it broken? And do you want a new motor or a NEW motor? And do you want it to be stock or to be built?
You can look on the Classifieds section on this forum and other forums for engines. You can use car-part.com to look up used engines in your area. You can talk to vendors on here about buying a built engine. You can get your stock motor rebuilt. You can keep driving your stock motor.
But really, there's only one sensible thing to be done. Build an EG33 twin turbo and drop it in. Nothing else makes sense, unless you're thinking LSX and RWD. That makes sense.