There are 2 supercharger kits for the 3S-GE
Blitz which is Roots type.
Power Enterprise a rotrex centrifugal
The Blitz will require upgraded clutch, my OEM lasted all of but 40miles before it started to slip. Most advertised kits do not inc. the FMIC,
expect it to be about £500+ more. The ECU will have to be sent to Blitz, Basically, they removed the speed cut, tweaked the fuel & ignition settings and added a trigger wire that connected to the clutch of the SC. I didn't do this (wish I did for the time being!) as I went with a Turbo Apexi Power FC (MAP Sensor)
I also have pulley upgrade running around 0.65bar Boost on stock compression. 0.6bar+ requires bigger injectors and an uprated fuel pump isn't a bad thing either.
Your driving style will have to change alot with this setup, its agressive and very very loud.