Hey there SR2
Welcome aboard!
The Sony turbo instal was pretty dodgy IMO.....
There are any number of turbo kits in the states of varying degress of quality.
The HiBoost kit is prolly the pick of them and StreetDreams here in Brookvale does an Australian-optimised version of it.
There is a thread in this forum with a link to an installation piece by piece of it, 77 pix and comments.
Also
www.flyinprotege.com has a good kit
wiredone here has the HiBoost kit in his car, pm him for info.
Goes hard, no risk.