Duratec or Zetec engine?
The ones on the Zetec are fairly easy to get too... The downstream O2 is right under the pass front of the car, where the access panel for the foglight is at... You will see a blue wire, should be the only one down there... The upstream O2 is right at the front of the engine, coming off the exhaust manifold... Can't miss it...
I am just going by where mine are on my 97, yours may be different...