if you aren't going for a kit, you can buy them at just about any tuner shop or website. it all depends on the quality of parts you are looking for. "only" hard thing would be the turbo manifold, and you can now hit up : HiBoost, Hass, FocusSport and F2 Focus (F2 Cars) as they all have turbo's out the engine. you can get tubing, turbo's and intercoolers anywhere and just make em work if you know how to machine/weld.