The Cheap way... an Ebay turbo manifold. A spacer for the manifold. Custom downpipe. Wastegate with dumptube. That's the heart of it. Then you'll need to change your intercooler piping, and intake pipe from AFM to turbo. Filter. Custom turbo feed and drain oil lines. You can do it yourself, but if you're having other people making your pipes then it can get a little expensive.
Driftmotion.com has some pretty nice T4 kits.
http://store.driftmotion.com/static/i-7m-gte67mmturbokit.php They have a coupler of other size turbos with their kits.
BTW, where did you get your screenname from? We used to have a member here a while ago with the same, or very similar name.