2nd Gen Non-Engine/Transmission brake pressure differential valve switch???

[Hootguy]

Does anyone know where i can find just the switch part of the pressure differential valve,,it's the little one wire switch in the most outboard bracket that the RWAL unit is attached to,,,cant be bought separately,,,or is a used unit from any other 96-98 2500 or 3500 the same??,,i'm tired of seeing my ABS and brake light on for the last 2 years and no cruise control. .