There's a huge corolla community at www.VVT-i.net and another board with a similar name, www.vvti.net. Basically the same people on both boards, but the first one has more people.

Anyway, a turbo kit for the 93-97 corolla is coming out at the end of this year and one for the 1zzfe shortly after that. There are other people on the board who have gone custom w. their turbos though, so you can talk to them on the board.