Two pieces of info for you. Cisco tried this and ran into a lot of walls before he got his done.
#1: Don't buy the RS2.0 mirrors. You will get just the mirror and housing, not the overlay with the light. The light is a seperate part.
#2: These are expensive as hell if you are buying the actual Scion part. Like all RS specific items Scion has overpriced them rediculously high so that people are discouraged from buying those parts therefore making the RS more unique.
Cisco got his done, but I don't know what aftermarket parts he used. Next time I see him I'll ask. Maybe Greg knows though since I'm sure he did the install!