I'm looking for a stock one.
I have to deal with CA emissions, so I can't use a HFC. And like the original poster, I can't afford $2k for a stock cat.
Everywhere I look says "will not ship to CA" OR "Not California Legal".
I'm going to call around to some local shops to see what they say.
2002 Ford Focus SVT 125k
1996 Nissan Pathfinder 250k
2001 Suzuki Marauder VZ800 9.5k