there is a place in adelaide that as far as i know has a front cut... last time i checked bout a year or so ago they still had it so you could start there. i dont know the name off the top of my head so ill get the link tonight if i remember.
it is rare that someone wills ell a whole motor so if your not in a rush then keep an eye out but the other option you have is that there are always bits and pieces of a 3TGTEU being sold so you can start collecting till you get most of it.
depending on what you are going to do all you really need is the block, head and rocker cover and the rest you can buy brand new like forgies, valves etc and build the motor like that but you would need a custom plenum and ex manifold (or you could try and locate the stock ones and use those as well...
in the parts for sale there are currently a few items for sale for that motor...