Looking for help with a torque sensor

[cobraprom620]

I currently run a lighnting rods small block set up on my bike. Love everything about it but the cadense sensing. Really wish i could get a torque sensing hub or maybe a bottom bracket that i can modify to fit the drive system . The main thing is the sensor needs to operate on 5v and use a single hall cadence and be only 4 wires.
Thanks for any help