Don't bag the Prius, they hammer for an economy car.
OP, don't bother with parts exchange (it's useless), try importing a complete turbo front cut. That way you get the brakes and other bits for engine conversion.
Heaps of Cefiros get drifted and crashed. They will suffer from JDM tax sadly, so save up and be patient.
Hell you could even throw in an RB25DE from R33/R34 in, they're pretty decent to rev out. There have been a few done on R31s here in Australia.