MPREZYA

I am looking for misc. parts for the Water to air IC on these cars like the cap for the IC as well as teh resivoir and other related items other than the IC itself. Also I am in dire need of the STi exhaust from the Turbo back as here in the US they want an exorbanant amount for it. I am willing to pay @$500+ shipping for the exhaust and not sure about the IC parts(if you can refer me to a company that sells them thanks).
Rich