[joe rayner]

Does anyone have a scrap Mountfield M1 rotavator, or know where I can obtain the bronze gear found on the output shaft of the gearbox - teeth on mine have worn away!!

[Gwiz]

I reckon you'll be very lucky to get one "off the shelf"
I expect you might need to get one made up, Sorry.
I might know of an engineering workshop that could do it, but it wouldn't be cheap. Have a look nearer home first.......