Chosen Solution
A white plastic gearwheel is loose inside the printer, its 3mm black plastic bearing has broken off its chassis part. Please advise how to find a replacement chassis part. The gearwheel is marked 1 AES >POM+PE< The wheel is in the so-called rear cover assembly, place where plastic spigot bearing broke is clear to see even after I shaved it smooth. Plastic is about 4mm thick, not sure whether to try & tap it for 6BA thread or put a bolt through and nut behind, concerned it may impede paper moving on the other side. Surely fixable though.
Searched online for a spare duplexer / rear cover for this printer, relieved to say I did not find one. Found that a 6BA bolt will go through the broken bearing spur, so drilled the duplexer frame 2.5mm and put the spur in a horizontal bench drill as a lathe, put a 2mm drill bit through using this also to take it out to 2.3mm, just holding the drill bit in my fingers. Remove bottom gear with one screw, fit spur with bolt from back onto frame, take some spare grease from the printer mech somewhere for the spur, fit middle gear and nut on with some metal glue (prob not needed). Bottom gear back on, works a treat.
