Most likely its the unit on the right hand side of your steering wheel which the dimmer switch controls, its all connected to the dash lighting.
Remove the whole vent piece and have a look, maybe a replacement (I think from memory its called a rheostat) is needed.
If you have an electrical...
No bottom lip, but im pretty sure Dan (GSRSOL) has a lip for sale?
Still relatively cheap, and in Brisbane
http://cgi.ebay.com.au/JDM-Mitsubishi-EVO-II-2-CC-Lancer-Front-Bumper-Bar-/250788614216?pt=AU_Car_Parts_Accessories&hash=item3a642a9048
Your GSR has a stock TD04l whereas your VR4 has a TD05h 16g.
Is this the difference you mean? Obviously there are different characteristics between the two turbo's.