Hi! Welcome to the board!
I'm really surprised you weren't able to come up with any links to performance parts for the MR2. You might also want to check the top of this forum for "stickies" which are info that's considered important keep avalible to everyone.
Not to be an a$$, but here's what I came up with in under 2 minutes:
MR2 Technical Knowledgebase - Adding a Turbo to a 5SFE
http://www.mr2.com/forums/na-5s-fe-3...induction.html
Google search - click me
Hope that helps.