clutch compatibility, have to change... Options

[Longo]

Hi guys, my clutch is goin to say "bye" to me very soon, so i'm searching something to replace it.
I searched into ebay (cause in italy everything cost triple ---I looooove this coutry ---, so for me is more convenient to buy from usa) but all the clutch i find have these applications:

1988 - 1993 Toyota Celica GT4
1990 - 1995 Toyota MR2 Turbo

I have a 1997 st205, so i think that it could be adapt cause mr2 has the same engine, but i don't know if mr2's clucth is good for st205.
Maybe that's a stupid question, but i have no knowledge on that, and i found nothing useful on other forums.
Can you guys give me some info?
which clutch do you advice? I should do some power-increasing job next year, so i don't want to use the OEM one.
...and another question: what's the difference between stage 1, 2 and 3?