You need:
Exhaust manifold/turbine housing gasket
Turbine housing/O2 housing gasket
O2 housing/exhaust gasket
Oil return pipe gasket
4 coolant banjo bolt copper washers
Anti-seize compound
All of these are stock parts.
While you're at it, you'll probably want to replace the stud in the turbine housing with a turbo/mani bolt (there are 3 bolts and 1 stud, but the stud makes it a pain to get the turbo off, so replacing it with a bolt makes future work easier).
I replaced all of the turbo/mani bolts/stud with 4 new bolts (one was already broken somehow). They were $6 each. I also got new O2/turbo bolts (3 total) and one new O2/turbo stud+nut.
I got all of this (and then some) from
Extreme PSI except that I had to get new banjo bolts to get the copper washers (my local AutoZone didn't have the right size, and Extreme PSI didn't sell them without the banjo bolt). Take one of the old copper washers in to your local auto parts store and see if they have the correct size. Much cheaper that way.
While you have it apart, you could always port the exhaust manifold and turbine housing
If you do that, you'll also need an exhaust manifold-to-head gasket and could also change the ex. mani. studs.
When you're all done, don't forget to prime your turbo before you start the engine!
