Thanks for the help guys.
GCG called me back today, these turbo's are designated under GT2560R now. (707160-5, 707160-9, 707160-10)
You can buy a kit from them now for the drain pipes with this new size - XTR420043.
You can find it here:
http://gcg.com.au/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=209&category_id=131&option=com_virtuemart&Itemid=53
I have one coming, i'll let you all know if it sorts the issue with having to file the compressor housing bolt for clearance also.
Still, this doesnt help if your like me and have the Nismo oil catch can. The Nismo fitting needs to be modified to this new flange size to bolt up.
I might see if they can make an option part for that also.
Cheers.