Those parts were available from the usual parts suppliers here and in the UK.  Unfortunately it has been 14 years since I had to rebuild my drivetrain so not so sure now.
Bearings should not be an issue.  Why do you need a new rear tailshaft?  The rear section is rebuildable like any propshaft - just get the UJs.
The front CV - not sure about - I never had an issue with mine.
VCU - for a while you could buy refurbished ones here but not seen them advertised for a while but I haven't been looking.  The issue with a 98 Freelander is that the front diff ratio (in the IRD) is too different from that in the rear diff so it kills the VCU very quickly.  By 180,000km my 97 Freelander had gone through 3 VCUs and on the last it killed the IRD.  I bought a used IRD and VCU from a very low Km 2002 TD4 from TR Spares in SA.  By the time the TD4s came around the diff ratio aspect had been fixed and they no longer systematically killed VCUs and then in turn kill IRDs.  The other advantage of these later IRDs is that revs at 100kph is reduced from just over 3000rpm to around 2750rpm.  
How is your VCU damper - they need to be considered but if getting a second hand VCU you will most likely get the damper as well.
So if you still have the original IRD you will still be going through VCUs regularly.
I would be checking the wreckers for a low KM late model FL1 TD4 drivetrain and putting that in and investigate what IRD you have.
If Woko is still around he can probably tell you better than I where to get the bits you want.
Now if you dont want to 4wd the car and just drive around town then I would not worry about the rear drive.  They work fine in front wheel drive only.
Garry
				
			 
			
		 
			
				
			
			
				REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101 
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
			
			
		 
	
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