Wheel/hub for GM8712 motor?

Hi,
I have 4 Pittman GM8712 motors (shaft diameter = 0.187 inches) and I want to mount wheels to them. So far, I haven’t been able to find any hub/wheel combo that would work with the motor shaft. Please advise the mechanical parts required to mount any wheel on them.

The motor spec can be found here:
servo2go.com/support/downloads/GM8712-31.pdf

Thanks!
James