I run a Kontronics Powerjazz. it's out of production, i think for the last 2 years or so. It's rated to 15S 100A constant and 200A peak. There are several companies producing a 14S ESC. Jeti/Hacker, YGE, Schulze. I heard rumors a while back Castle was working on something but haven't heard anything in a long time.
We ran 14S on my E9 "Synergizer" two years ago. Had Matt check it out at IRCHA '10. Planning on setting up my E7 with a Turnado A50-14L (400Kv) with a 13T pinion on 14S TP 4400 65C.
According to the head speed calculator it should come out close to this.
Throttle 65%: 2021
Throttle 70%: 2082
Throttle 75%: 2144
Throttle 80%: 2205
Shooting for 2100 RPM.
We'll see what it'll do.
chuck