Your search for "baja torque biasing diff" revealed the following:

TAYLOR 50GT V2 MCD Complete Package

$1,945.00

Hilatronics 8500 Super High Torque Digital Servo

$189.95

FLM Losi 5T Center Differential Carrier (Top Brace only)

$25.00

Spare layshaft for BLACKBONE 2 speed

$54.95

VEKTA.5 & VESLA.5 Differential out drive set (set of 2) [KV5547]

$29.99

Complete Outlaw V3 Billet Hybrid Slider (built to order)

$2,995.00

Hilatronics 7000 Super High Torque Digital Servo

$189.00

Kraken VESLA.5 Differential Ring Gear [KVS126]

$28.99