Hey Joe, front or rear are we talking about ? If it's front, it's a sealed hub and bearing, held on with a big nut VERY tight. On the rear, it's a bearing that is pressed into the hub, which rides in the rear suspension knuckle. More work required to change that than the front. You should be able to get front or rear from the local parts store easily. The rear wheel bearing is actually the same as a front for a 1986-1995 Taurus or Sable !!
cheers
Ed Nicholson
SCCoO