Check out Global Leader of Korean Parts and Accessories. They used to go by a different name but that escapes me right now. Most parts on our cars are interchangeable throughout all model years, although the SRT6 (specifically 2005,2006) has some differences.

Also Performance auto parts & aftermarket auto accessories for your car, specializing SRT4, Crossfire SRT6, SLK32, C32 AMG, VR-4 has proven to be a reliable source for several things as well. Just be sure to select the "Crossfire Limited" tab instead of the SRT6 one.