Normaly I would say "Ellis @ Ranglebox". But he's out of stock.
http://ranglebox.com/product/botbitz...2-brushed-esc/

Other option is the Original Botbitz (and supplier of Ranglebox)
http://botbitz.com/product/botbitz-8...ed-control-v2/

Of course, you can buy the Original.
https://hobbyking.com/en_us/catalogs...___store=en_us