i got 2 of these but they are made by yuntong. they work very well and the 20c rate is ok since the mamba max is a 100amp esc and it wont allow more then 100 amps to go through to the motor. even with the 100amps and a novak 8.5 motor my car is very fast and powerful.
http://rcbuy.vstore.ca/
this is where i get mine from, they are canadian so it works for me