8910 needs the white plastic part that goes in the middle of the spring

[Burnt Cobba]

hi mates.

Need someone to help me get a white plastic part replacement that another repairer lost while trying to repair this one up. This part fits into another black part and adjusts the spring to take the direction on the other side of the cog else the cog will try to force the spring down.

Thanks a lot for any help mates
al