Offroad-Express

I am new to this site, can someone please help me.
The free rolling hub plastic circular piece, flat has flat coil spring inside, the one that you have to take off when adjusting the wheel bearings has broken (the plastic bit). Need new one or new hubs.

Possibly see Toyota dealer and get a replacement part but you would pay through the teeth for it, even finding a secondhand unit might be tricky as there's not too many ferozas and Rocky's about anymore