6.5 inch Hoverboard motors sourcing

I just bought a ODrive 3.5 and I am intending to test it with 6.5 inch Hoverboard motors (with and without encoders) for a prototype of mobile robot (potentially replacing our expensive and bulky Brushed DC motors in our products).
However for a use in production, I am in search of a reliable manufacturer of such motors and maybe ask in the future for a custom design (more specifically thinner wheels or tires). Any advice of where to find such a manufacturer/provider ?

I think you will find some success on Alibaba.