The following items will work as a direct replacement

FT Aluminum Rear Hubs, black
Perhaps this alternate item will work for you: #91548.
Contents:
qty 2 Aluminum Rear Hub.
qty 4 Bearing Spacer.
- Toe angle is laser etched on part
- Anodized black
- Composite bearing inserts for minimized slop and long bearing life
- Hinge pin set screw hole for reduced slop
- Vertical ball studs for finer roll center adjustment
Contents:
qty 2 Aluminum Rear Hub.
qty 4 Bearing Spacer.
This part fits the following vehicles
- RC10B5M
- RC10B5
- RC10T5M
- RC10SC5M
- RC10B6D
- RC10B6 Club Racer
- Reflex DB10
- Trophy Rat
- ProSC10
- Pro2 SC10