There is a turbo forum.
The rev hard kit uses the t3/t4e as well as the drag generation III kit.
There is a book that you can get called the Honda Builder's Handbook (Volume-High Performance) by Joe Pettitt. It teaches you the things you need to do as well as the parts you need to build a reliable 470whp GSR motor. It is a good investment because building the gsr motor to run that high of psi needs a lot of knowledge and money.
Here is a site of the turbo kits available for the gsr:
http://www.turbo-kits.com/integra_turbo_kits.html
There are also custom kits that aftermarket shops carry around your area.