the car : 2003 Subaru WRX Wagon (manual)

So my car hit the curb hard sideways on its right side when i lost control in the rain.






Towed the car home and my friend/mechanic told me I need a few parts.

Need:
Rear Subframe
Rear right tierod
Rear right control arm
Rear right trailing arm

Now before putting ads all over different forums, I have a couple of questions.

-Which years are compatible with my parts?
-Sedan and Wagon parts interchangeable?
-Where can I get these parts?

Thanks.