I installed a shifter trim from AustoSpeedPerformance today. The installation was very simple - drill lead holes and put in 6 screws. Apparently much easier than an STi shifter trim, which I understand requires the removal of the plastic console around the shifter.
You can see it up close on their website:
It looks great with my Momo shift knob!
It's a lousy picture, but this is what my shifter looks like now.