I was going to suggest New South Performance as an alternative to stock, but it looks like they only make it for the Ion.
2004 Saturn ION Redline - She will be missed!
2012 Nissan 370Z NISMO
Former Redline Mods:
GM Stage 2, K&N Cold Air Intake, 17" Motoring Drifters, Autometer Boost Gauge, Aeroforce Interceptor
1 of 1012 Onyx Black 2004 Ion Redlines