DC Motors

We are students from IIT,Madras working on a international contest, Robocon.
We want nearly the following specifications for motors.

1) Speed : 250 - 300 rpm
2) Running Torque : 10 kgcm
3) Holding torque : 30 kgcm
4) 12 or 24 V
5) Maximum weight : 2 kg
6) Internal Brakes if possible

Note: If you provide motor with internal brakes, we dont require that much of holding torque.

If you can suggest us any motor with above specifications, please reply to us with the information of cost, shipping time if possible.

Waiting for your reply soon
Thank you for your support

Robocon Team
IIT,Madras