Seems like your new. First off, Welcome to AF! Please try to use the search button as much as you can. Also please read the stickies at the top. As for your question, try:
1) Ebay
2) Dsmtuners.com
3) Dsmtrader.com (A little risky, be sure that the seller is for real)
If you want a new one, there is a list of vendors in the FAQ sticky.
Good Luck
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95 Eclipse GS: OBX Full Exhaust System, OBX Headers, OBX Short shifter, OBX Spark Plugs & Wires, 17' MSR Rims w/ Wanli tires
96 Eclipse GS-T
: K&N Filter w/ Hardpipe, UICP & LICP, Greddy Type S bov, Greddy Boost Gauge
Hala Madrid!