What diameter are you seeking. This 32mm can easily drive 10amps and is usually under $10. I can't recall how hard I have driven it. I drove it at 21amps in a TK75 here. (Sorry 7 amps into 3S XML2's). I have driven MGT2's into the low teens such as here. The UI is not great though. Five modes you have cycle through. I always piggy back a different MCU when I use one.