HKS had a twin turbo kit. CelicaSupra.com has the magazine artical all about it.
The ArticalI've tried to find the turbo kit but its long gone... But it was cool.
Hey, even a 7MGTE swap would be cheaper than turbo charging a 5MGE... Although, Another company has made a brand new Turbo kit for the 5MGE/6MGE.
The linkDont forget that the 7MGTE has 250 HP... thats still engough to kick most cars asses
the Supra is a good choice, Well better than any WWD (Wrong Wheel Drive) Throw away Mitsu.
But dont feel bad, I've somtimes wondered about getting a 5th generation celica GT-S... and they are WWD too....