I have one servo system left from my old Zapp Stock.
This is a 750W kit with motor, driver and 10m cables.
the motor has a 20-bit encoder and the driver accepts step and direction, +/-10V or Ethercat field bus.
Its manufactured by Kinco and you can buy it directly from my eBay store.
This link is for the kit, but there are a lot more on the store, that is already heavily reduced and no vat added.