2 stage?
I got mine from DynoTune
Trick Window Switch
Features:
* 2 independent channels
* Integrated wide-open-throttle detection
* Each channel has a multi-gear lock-out setting
* User configurable for rising or falling TPS signal
* Supports low voltage tach signals as low as 3 volts
* Works with irregular tach signals such as V10 and 3cyl
* Push-button programming with integrated LED digital display
* Compact rugged, waterproof design

