www.oxygensensors.com and if you have an autozone, you can get a loaner o2 removal tool. It's like a normal socket except it has a slit in it for the o2 wire to go in.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15