Below are some manuals in PDF format that I have found on the web.

Series 3 Workshop Manual Part 1	Series 3 Optional Parts Catalogue Part 1
Series 3 Workshop Manual Part 2	Series 3 Optional Parts Catalogue Part 2
Series 3 Workshop Manual Part 3	Series 3 Optional Parts Catalogue Part 3
Series 3 Workshop Manual Part 4	Series 3 Optional Parts Catalogue Part 4
Series 3 Workshop Manual Part 5	Series 3 Workshop Manual V8 Supplement 1
Series 3 Workshop Manual Part 6	Series 3 Workshop Manual V8 Supplement 2
Series 3 Workshop Manual Part 7	Series 3 Workshop Manual V8 Supplement 3
Series 3 Parts Manual Part 1	Series 3 V8 Overdrive Manual Part 1
Series 3 Parts Manual Part 2	Series 3 V8 Overdrive Manual Part 2
Series 3 Parts Manual Part 3	90/110 Workshop Manual Part 1
Series 3 Parts Manual Part 4	90/110 Workshop Manual Part 2
Series 3 Parts Manual Part 5	90/110 Workshop Manual Part 3
Series 3 Parts Manual Part 6	90/110 Workshop Manual Part 4
Series 3 Parts Manual Part 7	90/110 Workshop Manual Part 5
Series 3 Parts Manual Part 8	90/110 Workshop Manual Part 6
Series 3 Parts Manual Part 9	300TDI Overhaul Manual
Series 3 Parts Manual Part 10	Fairy Overdrive Manual
Series 3 Parts Manual Part 11	V8 Overhaul Manual
Series 3 Parts Manual Part 12	FreeWheeling Hubs Manual
Series 3 Parts Manual Part 13	Defender Workshop Manual 1996
Series 3 Parts Manual Part 14
Series 3 Parts Manual Part 15