I don't have any affiliation to this kit.
eBay Motors: Flyin Miata 94-04 1.8L Turbo Kit w intercooler (item 300282525186 end time Dec-29-08 21:42:15 PST)

 

I have driven his car and can vouch for him without any hesitation. He has owned 3 M3's and used to be the service manager for the local Ferrari/Maserati/Lotus dealership. He is great with cars and very honest. He now has 2 kids, so the toys have to go and he might be picking up a 97 or 98 4-door M3.