U13 will be very hard. I have both an aus and jdm here at home and they are significantly different in the back and front end of the car. The fwd aus doesn't have the room in the tunnel for the drive shaft. The fuel tank is different as well as the floor pan where it all bolts up. The mount points for the rear cradle may align, but hard to tell. In the front there is no cross member and it all bolts in a lot different.
It would not be impossible, but it is a lot of work. A guy in the usa did, looks very good, but $$$$$$$$.
Probably better to look on gumtree for a cheap awd that needs some repair work to be carried out. There are some on there.
One in particular in Sydney with a blown engine going for about 1500. May be one in Melbourne soon but not sure what will happen with that one yet.