Actually, never mind Shiftmates - I think with a SRAM road (or 10s MTB) derailer you could just build up the groove about a mm with tape, and with an 11s MTB derailer you could file the groove a little deeper (it uses 12% more cable pull than the road / 10s MTB derailer, while the Sensah one uses 7% more).
Or a more robust solution than tape might be to put a bit of sleeve over the cable where it wraps around the cam... I'll give it a shot and report back.