I've actually located a LVC that in a sense is better than the Li-Saver:
http://www.dimensionengineering.com/LipoShield.htm
The only problem with it is that it's a soft cutoff, but this is better for racing conditions than a hard-cutoff (where the throttle is cut). Usually a decrease in throttle is pretty noticable.
SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz