yeah, hotrex is a good source for manifolds. then you will need wastegate, piping, fmic, turbo (will be based on your engine work and power goals), and blow off valve. after that you will need a tuning device, preferably an ECU chipped with an Uberdata or Crome chip (just cause they are the easiest and cheapest to use). thats really about it if you want to put it on a stock engine.
by the way, sol's link is the company that hotrex makes manifolds for.