Silly question but can you just swop out the v6 for a td4 lump - there are more in breakers these days and the saving on mpg alone must make it a possibility.
just to let you all know that thats me had my car serviced including changing timing belt and the automatic tensioner, tensioner and idler. just fuel filter to be changed and one of my coils. had it all the way to oban and back so think i am on the road to happy motoring with my freelander