Hi,
I had to remove one of the front fans, (push vent) on my car, which I think may be same type as your year 2000. I do not think it is the same as the earlier model, or at least the fan unit is fitted to the car differently and cannot be removed without removing the engine cooling radiator and the air con condenser radiator as it is removed through the space where these are fitted. If you do not have air conditioning, then this may well be an easier way to remove the front fans complete, but with air con its an expensive way to do it. Haynes manual describes how to remove unit on the earlier version (presume pre facelift) which you can get out complete quite easily from the front.
However, although the fan unit complete may be different or fitted differently, I think the actual motors may well be the same, or certainly adaptable to fit if you only have the earlier type available.
If they are just squeking I would have a look at yours first if you are mechanically minded. They probably only need some oil. I very much doubt if the actual bearing are available separately, they are sintered bronze "oilite" bushes.
First, to take off the plastic fan blade guard you have to use a little force. it is clipped into the assembly with arrow head type catches moulded in the plastic,(a bit like the cable tray lids, but bigger) and you have to locate them, there are 4, press the lugs towards the centre and pull the guard at the same time for each lug.
Then undo the screws holding the fan blades on to the motor spindle and remove the fan blades.
You will then see the screws that hold the motor into the fan assembly.
First though, you have to cut the wires on the two pin plug on the bottom right hand corner where they go through a hole in the fan assembly to the rear of the motor. BUT, cut them about 25mm from the plug this is so you have enough wire available so you can crimp them together again when you have repaired the motor. You can then push the wires through the hole, and undo the screws and remove the fan motor.
You will see that the rear end of the motor is held to the main body of the motor by some lugs crimped over the end plate. You can carefully bend these back and remove the end of the motor complete with the motor brushes. You will find the bearing is a sintered bronze bush bearing which you can soak in oil, overnight in a warm place is best. You cannot remove the armature as the boss for the fan is a tight press fit, but you can oil around the shaft to get oil in the front bearing
It's a bit fiddly getting the brushes over the commutator again, but you can reassemble the motor and bend the lugs back in again.
Test it first, then put back, make sure you route the wires clear of the fan and re crimp the connector wires back with some blue butt connectors.
I have not removed the motor from the rear (pull vent) but this will come out easily complete away from the radiator, but although it has a different connector, the motor looks the same type and I am sure you could try the same method to oil it.
Roger