Need to identify an off-the-shelf motor for a high performance robotic application.

Need to identify an off-the-shelf motor for a high performance robotic application. The following detailed specifications are required for the motor and must be all met in order to qualify the project as successful: DC Brushless MOTOR SPECIFICATIONS Peak Torque : 20 Nm (capable to accelerate a mass of 1000 lb from 0 to 45 mph in 8 sec or less) (capable of achieving 65 mph, wheel diameter 5 inch, RPM ~ 5000 and gear ratio of 1.1:1) Continuous Torque: 7.5 Nm - (capable to cruise at 55 mph or higher) Operating Cycle: 20 minutes minimum at continuous peak torque without motor damage Peak Power @shaft : 10.5 Kw Continuous Power @shaft : 3.9 Kw (5000 RPM) Bus Voltage : Max : 80 VDC Nominal: 72 VDC Min: 65 VDC Motor Controller Per manufacturer recommendation Integrated Optical Encoder Type: Incremental optical encoder 1600- 1800 CPR Goal, 1000 CPR acceptable Encoder disc must be capable of withstanding operating temperatures Cooling: External cooling fan Environment: Temperature Max : 150 F Min: 20 F Humidity: Max 90% Min 0%