To get the GT28716 to fit I used these parts from ATP Turbo here in the USA

GT2871R turbo with T3 housing http://www.atpturbo.com/Merchant2/me...egory_Code=GRT

ATP Internal Wastegate http://www.atpturbo.com/root/releases/release103105.htm

Oil Return Adapter http://www.atpturbo.com/root/releases/release112205.htm

As for fabrication, new coolant lines for the turbo had to be made and the V-Band flange needs to be welded to the exhaust downpipe. As for tuning and such I can't help you out there since I'm not too familiar with your local tuners