http://www.gizmag.com/go/6682/

from the intro to the article:

Subaru Australia is now offering a complete service to race drivers, producing a range of custom motorsport vehicle packages based on the popular Impreza WRX STI spec.C – the Group N FIA homologated car developed by Fuji Heavy Industries in Japan. Customers can spec the car to any desired specification, from the base Impreza WRX STI at AUD$69,990 (US$55,000) to the full Production World Rally Championship (PWRC) version at AUD$195,000 (US$153,000).

So now all you need an ingenious support crew and someone crazy enough to sit beside you and read you instructions while you point the 230 kW projectile at the horizon. Finally, just to be clear, the WRC cars of Solberg and Atkinson are a slightly higher spec again – if they were available, they’d cost US$1.5 million apiece.

Don't you wish you were down under?

 

You can get similar stuff here, I'd bet Vermont Sports Car would gladly build you a nice Gp N car for 150G or so.

 

In fact you can pick up a used one for less than 40,000

http://www.specialstage.com/classifi...ct=159&cat=all