If you want to do some customizing, there is a guy in England who makes nice resin parts for the Tamiya S2000...
He is here: http://www.scaleautostyle.com/main.php
And a US distributor is here: http://www.detailanddesigninscale.com/index.html
I have a coupld of his resin casts, and they are quite good.
www.naplak.com/modeling ... a free site for modelers
www.scalehobby.com/forum/index.php ... a nice Modeling Forum