Mmm, might have to try shops that arent local, shipping may not be as bad as you think along popular routes (like Melb to Syd for example)
Good luck with it
Considering you've already got an RB25 head, id be going the rb30 bottom end for sure, just forged pistons, good oil setup, and still the same turbo
Is the head youve got ok or is it stuffed?