All-Trac drivetrain

anybody know where I can find an all-trac drivetrain for a 91-93 Celica. I recently sold my old car and bought a 93 Celica GT convertible and the performance is just lacking. I would like to stick with the 5sfe engine, since it has under 50k original miles, but I will go with new headers, intake, and exhaust. I was curious though if the all-trac drivetrain can be found anywhere without having to find a wrecked all-trac turbo and pulling out from a junk-yard or something. I would love to convert my car to AWD. Any information on this would be awesome.