So it is the compressor making that horrible noise ? That does sound pretty bad, and the troubleshooting guide does seem to indicate that replacement is required . It does say if the noise is just coming from the clutch, then only the clutch needs replacing (compressor clutch, that is, of course).
How about a breaker's (lots on eBay) ? If a car hasn't had too much front-end damage then you should be ok.
Looks like the compressor change with the 2001 update, sounds like you've got an LE model which would be one of the later cars, i.e. later compressor. The part is 88320-53020 for the later compressor.