Team Orion has a new esc coming out soon: Vortex R10Pro (1-2S)

Castle Creations: Mamba Max Pro 1s

These are some other options I have found. But to be honest, I didn't contact Castle cause I didn't even consider them for 1/12 - didn't think they would have anything and happened to stumble on it by accident. For comparison I heard the Tekin RS is about half the size of Castle's though? Back on point... Out of everyone that I contacted be it facebook, etc. Or this thread for that matter the only two that got back to me was Novak w/ their incredible post including part numbers and all available options to me. And the other was Team Orion via facebook.

Something to consider when selecting your electronics...