I got mine done for around $750 (sorta mates rates, but you should be able to get similar pricing) down here in Wollongong.
Took them 1 day to do it (me as the guinea pig). They now know exactly how to make them, and have sold a few to Soarer owners since doing mine.
3" piping everywhere from the turbos all the way to twin 3" mufflers at the rear.
Certainly flows much better than stock... boost now sits as 12.5PSI naturally without using any bleed valves etc.
Spool time is also decreased (not that is was much in the first place).