Think I bought mine on eBay - budget around £200 for a full shocks on their own - not sure on fitting though I'm afraid. You need to make sure you get the correct fitting for the rears though. Year 2000 would likely be eye fitting rather than fork, unless the beam has been changed at some point.
However, while they're being changed, it's worth getting top mounts for all four corners and top bearings (cheapest I found was from ford themselves) to do the job properly.