These guys are down the road from me and i used to get some parts for my Rotrex s/c Celica as well.
They have a Rotrex kit for the 2.5i and i think they have done a 3.0 as well. Here is a link for the 2.5i, dynoed at 170kws ~ 230whp.
The Price is around AUD$6500 with ECU.
They also think they can tune a M with the Xede piggy back system.
http://www.bulletcars.com/supercharg...er-system.html
Just thought someone might be interested.