Kevin,
Here is a 100 psi sensor from Autometer; click here => 100 psi Sensor Kit be sure to request their calibration data so you can program it into the MS3. Haltech shows a 150 psi oil sensor they sell on their website. A search will pull up a bunch of sensor providers with names like Honeywell, Bosch etc. I suspect the short way home would be either the Autometer sensor or the Haltech sensor.
Here is a 100 psi sensor from Autometer; click here => 100 psi Sensor Kit be sure to request their calibration data so you can program it into the MS3. Haltech shows a 150 psi oil sensor they sell on their website. A search will pull up a bunch of sensor providers with names like Honeywell, Bosch etc. I suspect the short way home would be either the Autometer sensor or the Haltech sensor.