I am selling the stock turbo from my wrx (less than 10,000 miles on it when I swapped to a different one) for $400.
Also, the stock tmic: $50
Finally, the stock rear sway bar (16 mm) : $40.
I am not knowledgeable about compatibility so you will have to research a bit--sorry.
Also, pick up only. I live in the Bronx, NY.