Hi grumpy, It looks like it was only available as a spare part, there was no product recall for retro-fitment, so perhaps it was available to mower repairers to fit a machine with a broken nylon gear. Anyway, it is consigned to history now as spares for the 430/590 are now almost extinct.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl
