I am interested in a pdf parts book. My John Deere 850 was built in August 1979 and has a serial number of 006910. Many Thanks.The Fenders for the 850 have been obsolete since 1988, however the 850 and 950 used the same fenders, so that might help your search
FYI the part number for the LH fender is AM876122
A search of the net using "compact tractor junkyard" should get you started
MCT what's your serial number? I'll forward you a PDF parts book