Any of the stuff listed above below $1000 i would buy brand new direct from:

Japanparts.com

GST and duty free delivered to your door if less than $1000 per import.

The Rims could be done cheaper from Rampart or some of the Vendors on Rexnet I rekon.
ECU...Verso it and get a better tune than STI to boot when they support the flashing the SI-Drive GT.

J